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Type: Prelims Only

  • Global Geological And Climatic Events

    Aurora Borealis: What are Northern and Southern lights? Why do they occur?

    Prelims Only | Enviro & Biodiversity | Mains Paper 1: Geographical Features & Their Location

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Auroras and its types, Coronal Mass Ejections/ Solar Storm

    Mains level: NA

    Why in the news?

    • In a rare event, the night sky over Hanle village in Ladakh was illuminated by the northern lights or aurora borealis.
      • Concurrently, the southern lights, or aurora australis, were observed in New Zealand and Australia.

    What are Auroras?

    • Auroras are natural light displays that appear as bright, swirling curtains in the night sky.
    • They are typically seen near the Poles but can occasionally be observed at lower latitudes.
    • These lights can display a range of colors, including blue, red, yellow, green, and orange, due to the interaction of solar particles with different gases in the Earth’s atmosphere.
    • The phenomenon is known as:
    1. Aurora borealis in Northern Hemisphere and
    2. Aurora australis in Southern Hemisphere

    What causes Auroras?

    • Interaction with Earth’s Magnetic Field: As the solar wind approaches Earth, it interacts with the planet’s magnetic field, causing some charged particles to enter the atmosphere near the poles.
    • Interaction with Gases: These particles interact with gases in the upper atmosphere, producing colourful flashes of light. Collision with oxygen produces green light, while interaction with nitrogen results in shades of blue and purple.

    Reasons for Aurora in Ladakh:

    • Intense Solar Activity: Auroras can extend to lower latitudes during periods of intense solar activity, such as solar flares and coronal mass ejections (CMEs).
      • The CMEs are from the AR13664 region of the sun that has produced several high-energy solar flares
    • Localized magnetic anomalies: Variations in Earth’s magnetic field could potentially influence the occurrence of auroras in specific areas, including regions at lower latitudes.

    Impact on Tech Infrastructure 

    • Auroras can pose challenges to space-dependent technologies and operations.
    • Disruptions in Global Positioning Systems (GPS), radio communications, flight operations, power grids, and space exploration endeavors may occur during such events.

    PYQ:

    [2022] If a major solar storm (solar flare) reaches the Earth, which of the following are the possible effects on the Earth?

    1. GPS and navigation systems could fail.
    2. Tsunamis could occur at equatorial regions.
    3. Power grids could be damaged.
    4. Intense auroras could occur over much of the Earth.
    5. Forest fires could take place over much of the planet.
    6. Orbits of the satellites could be disturbed.
    7. Shortwave radio communication of the aircraft flying over Polar Regions could be interrupted.

    Select the correct answer using the code given below:

    (a) 1, 2, 4 and 5 only
    (b) 2, 3, 5, 6 and 7 only
    (c) 1, 3, 4, 6 and 7 only
    (d) 1, 2, 3, 4, 5, 6 and 7

     

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  • The Crisis In The Middle East

    India backs Palestine’s bid for full UN membership

    Prelims Only | International Relations | Mains Paper 2: Bilateral, Regional and Global Groupings and agreements involving India

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: UN and its membership; Rights and privileges enjoyed by UN Member

    Mains level: NA

    Why in the news?

    India has voted in favour of a UN General Assembly resolution recommending Palestine’s admission as a full member of the United Nations.

    Arab push for Palestine’s Membership

    • The emergency special session was convened by the Arab Group, with the UAE presenting the resolution in support of Palestine’s full membership.
    • The resolution calls for the Security Council to “reconsider” Palestine’s membership favourably, based on its determination that Palestine is qualified for UN membership.
    • The resolution received overwhelming support, with 143 votes in favour, including India’s, nine against, and 25 abstentions.
    • As an observer state, Palestine currently lacks voting rights in the General Assembly and cannot nominate candidates to UN organs.

    India’s Stance on Palestine:

    • In 1988, India recognized the State of Palestine.
    • In 1996, India opened its Representative Office to the Palestine Authority in Gaza, later relocating it to Ramallah in 2003.

    About United Nations

    Details
    Background  Resulted from the devastation of World War I and II

    Highlighted the need for a more effective international body to maintain peace and prevent future conflicts.
    Predecessor The League of Nations, created in 1919 after World War I, aimed at peacekeeping but failed during World War II.
    The Atlantic Charter Issued in August 1941 by President Franklin D. Roosevelt (USA) and Prime Minister Winston Churchill (UK), this document outlined principles for a post-war world and set the stage for the UN’s creation.
    Naming The term “United Nations” was coined by President Roosevelt in 1941 to describe the allied nations opposed to the Axis powers.
    Declaration by United Nations On January 1, 1942, representatives from 26 Allied nations, including India under British colonial rule, signed this declaration in Washington DC, formalizing their alliance and war objectives.
    Official Formation UN was officially established on October 24, 1945, when its Charter was ratified by 51 member countries

    It included 5 permanent Security Council members: France, Republic of China, Soviet Union, UK, and US.
    First General Assembly The inaugural meeting of the UN General Assembly took place on January 10, 1946.
    Core Goals
    1. To maintain international peace and security.
    2. To foster friendly relations among nations.
    3. To cooperate in solving international problems and in promoting respect for human rights.
    4. To be a centre for harmonizing the actions of nations in attaining these common ends.
    India’s Role India was a founding member of the United Nations, having signed the initial Declaration alongside 25 other Allied nations during World War II.

     

    Rights and Privileges:

    • The rights and privileges of member states in the United Nations are designed to ensure that all members can effectively participate in the organization’s activities and benefit from its resources.

    PYQ:

    [2022] With reference to the “United Nations Credentials Committee”, consider the following statements:

    1. It is a committee set up by the UN Security Council and works under its supervision.
    2. It traditionally meets in March, June and September every year
    3. It assesses the credentials of all UN members before submitting a report to the General Assembly for approval.

    Which of the statements given above is/are correct?

    (a) 3 only
    (b) 1 and 3
    (c) 2 and 3
    (d) 1 and 2

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  • Police Reforms – SC directives, NPC, other committees reports

    What is Interim Bail?

    Prelims Only | Polity | Mains Paper 2: Executive & Judiciary

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Bail and its legal provisions

    Why in the news?

    The Supreme Court has granted interim bail to Delhi Chief Minister Arvind Kejriwal in the liquor policy case till to campaign for the Lok Sabha elections.

    What is Interim Bail?

    • Interim bail in India is a temporary release granted to an accused person from custody under Section 439 Cr.
    • It can be granted to address urgent matters such as medical emergencies, family crises, or other significant personal issues.

    Legal Provisions for Interim Bail

    Interim bail in India is NOT explicitly defined under a specific statute but is derived from the discretionary powers granted to courts under various legal provisions.

    The most relevant laws and principles include:

    1. Code of Criminal Procedure, 1973 (CrPC): While the CrPC does not explicitly mention “interim bail,” it provides the framework for granting bail in general. Sections like 437 (bail in non-bailable cases by Magistrate), 438 (anticipatory bail), and 439 (special powers of High Court or Court of Session regarding bail) are used by courts to grant bail, including interim bail, based on judicial discretion.
    2. Constitutional Provisions: The Constitution of India under Article 21, which guarantees the right to life and personal liberty, is often interpreted to include the right to bail as part of the fair and just legal process.

     

    Back2Basics: What is Bail?

    • Bail is the conditional release of a defendant with the promise to appear in court when required.
    • The term also means the security that is deposited in order to secure the release of the accused.
    • In India’s legal world, the term offense has been categorized as bailable offenses and non-bailable under the Code of Criminal Procedure.

    Why need Bail?

    • Bail is a fundamental aspect of any criminal justice system.
    • A person can defend himself/herself better when he/she is free, thus ensuring free trial.
    • The practice of bail grew out of the need to safeguard the fundamental right to liberty.
    • Liberty is the right of one whose guilt has not yet been proven.

    Types of Bail in India

    • Depending upon the sage of the criminal matter, there are commonly three types of bail in India:
    1. Regular Bail: Granted to a person who has already been arrested and is in custody. This type of bail is provided under Sections 437 and 439 of the Code of Criminal Procedure, 1973 (CrPC). It allows the accused to be released from custody while the trial is ongoing.
    2. Anticipatory Bail: Under Section 438 of the CrPC, anticipatory bail is a pre-arrest legal process. It is granted when a person apprehends arrest on an accusation of having committed a non-bailable offence. This type of bail ensures that the accused will be released on bail in the event they are arrested.
    3. Interim Bail: This is temporary bail granted for a short period. Interim bail is often granted to allow the accused some relief until a final decision on their regular or anticipatory bail plea is made.

    Conditions for Grant of Bail in Bailable Offences

    • Section 436 of the Code of Criminal Procedure, 1973, lays down that a person accused of a bailable offense under IPC can be granted bail if:
    1. There are sufficient reasons to believe that the accused has not committed the offence.
    2. There is sufficient reason to conduct a further inquiry in the matter.
    3. The person is not accused of any offence punishable with death, life imprisonment or imprisonment up to 10 years.

    Conditions for Grant of Bail in Non-Bailable Offences

    • Section 437 of Code of Criminal Procedure, 1973 lays down that the accused does not have the right to apply for bail in non-bailable offences.
    • It is discretion of the court to grant bail in case of non-bailable offences if:
    1. The accused is a woman or a child, bail can be granted in a non-bailable offence.
    2. There is a lack of evidence then bail in non-Bailable offenses can be granted.
    3. There is a delay in lodging FIR by the complainant, bail may be granted.
    4. The accused is gravely sick.

     

    PYQ:

    [2021] With reference to India, consider the following statements :​

    1. Judicial custody means an accused is in the custody of the concerned magistrate and such accused is locked up in police station, not in jail.​

    2. During judicial custody, the police officer in charge of the case is not allowed to interrogate the suspect without the approval of the court.​

    Which of the statements given above is/are correct?​

    1. 1 only ​
    2. 2 only​
    3. Both 1 and 2 ​
    4. Neither 1 nor 2​

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  • New Species of Plants and Animals Discovered

    Kerala bans Oleander Flowers in Temple Offerings

    Prelims OnlySpecies | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Oleander Flowers

    Why in the news?

    Kerala temple authorities have banned the use of oleander flowers in offerings following the accidental poisoning of a woman who chewed oleander leaves.

    What is Oleander?

    • Nerium oleander, commonly known as oleander or rosebay, is a plant cultivated worldwide in tropical, subtropical, and temperate regions. 
    • Known for its drought tolerance, the shrub is often used for ornamental and landscaping purposes.
    • In Kerala, it’s called arali or kanaveeram and is used for natural fencing along highways and beaches.
    • According to the IUCN Red List, Nerium oleander (Oleander) is classified as Least Concern

    Traditional Medicinal Uses:

    • Termed as “desert rose” in ancient texts, oleander has been trusted with its medicinal properties such as a hangover cure, in cancer treatments, and as an antiviral.
    • The Ayurvedic Pharmacopoeia of India mentions oleander, particularly the use of oil from the root bark to treat skin diseases.
    • oleander’s use in treating skin diseases, leprosy, wounds, itching, and parasites.

    Toxicity of Oleander:

    • Oleander is highly toxic due to cardiac glycosides present in all parts of the plant.
    • Cardiac glycosides like oleandrin and digitoxigenin exert pharmacological effects on the heart, leading to nausea, vomiting, irregular heartbeat, and, in severe cases, death..

    PYQ:

    [2018] Why is a plant called Prosopis Juliflora often mentioned in the news?

    (a) Its extract is widely used in cosmetics

    (b) It tends to reduce the biodiversity in the area in which it grow

    (c) Its extract is used in the synthesis of pesticides

    (d) None of the above

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  • Police Reforms – SC directives, NPC, other committees reports

    What is an Interpol Blue Corner Notice?

    IOCRPrelims Only | International Relations | Mains Paper 2: Important International Institutions

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Interpol, Blue Corner Notice

    Mains level: NA

    Why in the news?

    • Karnataka’s political landscape is rocked by accusations of sexual abuse against a sitting MP belonging to a prominent political family.
    • Following explicit video leaks allegedly implicating him, Interpol has issued a Blue Corner notice, as he remains on the run.

    INTERPOL’s Notice System:

    • The Interpol issues various types of notices to its member countries about individuals who are either missing or wanted.
    • While these notices aren’t legally binding and countries aren’t required to act on them, they are commonly used to arrest and extradite suspects.

    The following entities can request for a notice:

    • Notice request by the Member Country
    • International Criminal Tribunals and the International Criminal Court can also request notices for individuals accused of serious crimes like genocide, war crimes, and crimes against humanity under their jurisdiction.
    • The United Nations can request notices related to enforcing sanctions imposed by the Security Council.

    What are Blue Corner Notice?

    • Purpose: Blue corner notice, also known as an “enquiry notice,” facilitates sharing critical crime-related information, including criminal records verification and locating individuals.
    • Example: In January 2020, Interpol issued a blue corner notice to locate fugitive Nithyananda, a self-styled godman.

    About INTERPOL (International Criminal Police Organization)

    Details
    Overview
    • Established in Vienna, Austria (1923), it enables cross-border police cooperation and supports and assists all organizations, authorities and services whose mission is to prevent or combat international crime.
    • An inter-governmental organization comprising 195 member countries,
    • Facilitates better coordination among police forces globally
    Functions
    • Enables member countries to share and access data on crimes and criminals
    • Offers technical and operational support to member countries
    • Manages 19 police databases containing information on crimes and criminals, accessible in real-time
    • Provides investigative support, including forensics, analysis, and assistance in locating fugitives worldwide.
    Working
    • Run by a Secretary General
    • Headquarters located in Lyon, France
    • Global complex for innovation based in Singapore.
    • Several satellite offices in different regions.

    I-24/7 Service: Global Police Communications System that provides a common platform for the member countries’ police organizations to share sensitive and urgent police information.
    India’s Membership
    • Joined in June 1956.
    Functioning in Member Countries
    • Each member country has a National Central Bureau (NCB), serving as the central point of contact for the general secretariat and other NCBs worldwide
    • NCBs are typically managed by police officials and situated in the government ministry responsible for policing (e.g., CBI in India)
    • Interpol’s databases contain various information, from names and fingerprints to stolen passports, accessible in real-time to member countries
    • Provides investigative support to member countries, aiding in forensic analysis and locating fugitives globally.
    Notices Interpol issues seven types of notices:

    1. Red Notice: Seeks the location and provisional arrest of fugitives.
    2. Blue Notice: Requests information about a person’s identity or activities.
    3. Green Notice: Warns about individuals likely to repeat crimes.
    4. Yellow Notice: Aids in locating missing persons.
    5. Black Notice: Seeks information about unidentified bodies.
    6. Orange Notice: Warns of imminent threats to public safety.
    7. Purple Notice: Seeks or provides information on criminal methods.

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  • Coronavirus – Disease, Medical Sciences Involved & Preventive Measures

    FLiRT Variants: Latest Twist in the COVID-19 Saga

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: FLiRT Covid Variant

    Why in the news?

    The emergence of new variants KP.2 and KP1.1, known as the FLiRT variants, has raised global concerns.

    • Despite vaccination efforts, these variants pose challenges, leading to concerns about a potential rise in COVID-19 cases.

    What are the FLiRT Variants of COVID-19?

    • KP.2 and KP1.1, dubbed ‘FLiRT’ variants, are descendants of the Omicron JN.1 which spread globally over the winter last year.

    Features and Differences from Other Variants

    • New Spike Mutations: The FLiRT group includes two specific mutations that are believed to enhance the virus’s ability to infect human cells.
    • Transmission and Evasion: Preliminary studies suggest that KP.2, the more prevalent of the two, may possess enhanced capabilities to evade immune responses generated by vaccines and previous infections.

    Are FLiRT Variants Riskier than JN.1?

    • Increased Immune Evasion: Research indicates that KP.2 shows a significant ability to escape immunity from both the latest vaccines and previous infections.
    • Reproduction Number: The reproduction number of KP.2 may be higher than that of JN.1, indicating a potentially greater ability to spread.
    • No definitive evidence: While there’s no definitive evidence that FLiRT variants cause more severe illness, their ability to circumvent immune defences can lead to more infections and, by extension, potential increases in hospitalizations.

    PYQ:

    [2022] In the context of vaccines manufactured to prevent COVID-19 pandemic, consider the following statements:

    1. The Serum Institute of India produced COVID-19 vaccine named Covishield using mRNA platform.
    2. Sputnik V vaccine is manufactured using vector based platform.
    3. COVAXIN is an inactivated pathogen based vaccine.

    Which of the statements given above are correct?

    (a) 1 and 2 only

    (b) 2 and 3 only

    (c) 1 and 3 only

    (d) 1, 2 and 3

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  • Innovations in Sciences, IT, Computers, Robotics and Nanotechnology

    Artificial Rain through Cloud Seeding

    Prelims Only | Science Tech | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Cloud Seeding, Seeding Agents

    Why in the news?

    The Uttarakhand government faced scrutiny from the Supreme Court following Forest fires that claimed lives in the state.

    • Justices highlighted the inefficacy of relying solely on cloud-seeding or rain gods to address the crisis.

    Case Study: Experimenting Artificial Rain in India

    • A recent study published in the Bulletin of the American Meteorological Society (BAMS) highlighted the success of a cloud seeding trial in Maharashtra’s Solapur region, which resulted in an 18% increase in rainfall compared to normal patterns.
    • Scientists from the Indian Institute of Tropical Meteorology in Pune and other institutes conducted this study.
    • The experiment targeted warm convective clouds with a height above zero degrees Celsius, releasing calcium chloride particles to stimulate rainfall.
    • Spanning from 2017 to 2019, the experiment analyzed 276 clouds using advanced tools like automatic rain gauges, radars, radiometers, and aircraft.
    • Glaciogenic seeding, attempted in clouds containing both ice and water, did not significantly impact rainfall at the seeding location, according to the study’s findings.

    About Cloud-Seeding

    • Cloud seeding is a weather modification technique aimed at altering precipitation patterns by dispersing substances into clouds to stimulate rainfall or snowfall.
    • It is used to mitigate hail, disperse fog, and either induce precipitation or prevent it from occurring in subsequent days.
    • It involves the dispersal of substances like silver iodide, potassium iodide, dry ice, and hygroscopic materials such as table salt into the atmosphere.
    • Techniques include:
    1. Static seeding: promotes ice particle formation in supercooled clouds, and
    2. Dynamic seeding: enhances convective cloud development through the release of latent heat.
    • Dispersion methods range from aircraft and ground-based generators to newer approaches like drones delivering electric charges or infrared laser pulses.

    Limitations: Impact on Environment and Health

    • Concerns persist regarding the potential accumulation of seeding agents in sensitive ecosystems, although detailed studies have shown negligible impacts.
    • The chemicals used, such as silver iodide, may potentially damage the environment and cause health issues like iodine poisoning in high concentrations

    PYQ:

    [2019] In the context of which of the following do some scientists suggest the use of cirrus cloud thinning technique and the injection of sulphate aerosol into stratosphere?

    (a) Creating the artificial rains in some regions

    (b) Reducing the frequency and intensity of tropical cyclones

    (c) Reducing the adverse effects of solar wind on the Earth

    (d) Reducing the global warming

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  • Tiger Conservation Efforts – Project Tiger, etc.

    Tiger Translocation in Sahyadri-Konkan Wildlife Corridor  

    Places in newsPrelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Sahyadri-Konkan Wildlife Corridor, Tadoba-Andhari TR

    Mains level: NA

    Why in the news?

    Maharashtra’s plan to increase tigers count in Sahyadri-Konkan Wildlife Corridor by translocating tigers from Tadoba-Andhari Tiger Reserve (TATR) (Chandrapur, Maharashtra) underscores the critical role of wildlife corridors in conservation efforts.

    About Tadoba-Andhari Tiger Reserve (TATR)

    • Tadoba became one of India’s earliest national parks when it was declared in 1955, alongside Kanha National Park.
    • The name “Tadoba” is derived from the deity “Tadoba” or “Taru,” worshipped by local Gond Tribals, and “Andhari” refers to the Andhari River flowing through the reserve.
    • It was later expanded and officially merged with the Andhari Wildlife Sanctuary in 1993 to form the TATR.
    • TATR is regarded as one of the world’s most preferred destinations for tiger sightings and is a critical part of Project Tiger, aimed at conserving tigers in India.
    • The reserve has 115 tigers, including 88 within the forest and 27 in the areas immediately surrounding the reserve.

    About Sahyadri-Konkan Wildlife Corridor  

    • The Sahyadri-Konkan corridor (Sahyadri-Radhanagari-Goa-Karnataka), plays a vital role in conserving wildlife, particularly tigers, in the northern Western Ghats region.
    • It spans throughout the states of Maharashtra, Goa, and Karnataka, specifically through the Western Ghats, one of the world’s eight biodiversity hotspots.
    • Protected Areas Connected:
    1. Sahyadri Tiger Reserve (includes Koyna Wildlife Sanctuary (WLS) and Chandoli National Park) and Radhanagari Wildlife Sanctuary (Maharashtra);
    2. Bhimgad Wildlife Sanctuary and Kali Tiger Reserve (includes Anshi National Park and Dandeli WLS) in (Karnataka);
    3. Mollem National Park, Netravali Wildlife Sanctuary (Goa).
    • Fauna: Tiger (Panthera tigris), Indian leopard (Panthera pardus), dhole (Cuon alpinus), and sloth bear (Melursus ursinus), etc.
    • The Western Ghats, including parts of the corridor, are designated as a UNESCO World Heritage Site in 2012 due to their outstanding universal value in terms of biodiversity and endemic species.

    PYQ:

    [2020] Among the following Tiger Reserves, which one has the largest area under “Critical Tiger Habitat”?

    (a) Corbett

    (b) Ranthambore

    (c) Nagarjunsagar-Srisailam

    (d) Sunderbans

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  • Health Sector – UHC, National Health Policy, Family Planning, Health Insurance, etc.

    Widal Test: Flaws of Typhoid Diagnosis  

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Diseases; Widal Test, Salmonella Typhi Bacteria;

    Mains level: NA

    Why in the news?

    Patients with fever in India often undergo testing and treatment for typhoid fever, primarily relying on the Widal test.

    • The Widal test, though widely used, has several limitations that affect its accuracy and reliability.

    Typhoid diagnosis using Widal Test

    • The Widal test is used primarily to diagnose typhoid fever.
    • Typhoid fever, caused by Salmonella Typhi and related bacteria, presents with symptoms like high fever, stomach pain, weakness, and gastrointestinal issues.
    • It detects antibodies in the patient’s blood against the O (somatic) and H (flagellar) antigens of Salmonella Typhi.
    • Procedure:
    1. The presence of these antibodies is detected through an agglutination reaction.
    2. The test involves serial dilution of the patient’s serum.
    3. The highest dilution at which agglutination occurs indicates the antibody titer, with higher titers suggesting an active infection.

    Diagnostic Challenges:

    • The gold standard for diagnosing typhoid involves isolating the bacteria from blood or bone marrow cultures, which is time-consuming and resource-intensive.
    • Widal test is commonly used due to its convenience and accessibility. However, the Widal test’s interpretation is complicated by factors like the need for multiple serum samples, variations in cutoff values, and potential cross-reactivity with antibodies from other infections or vaccines.

    Challenges with Widal Test:

    • Impractical: A single positive Widal test does not confirm typhoid.
    • Complicated result interpretation: High background antibody levels and variability in test cutoff values.
    • Cross-reactivity with antibodies from other infections and false negatives due to prior antibiotic therapy undermine test reliability.

    Consequences of Widal Test Use:

    • Erroneous results obscure the true burden of typhoid in India, leading to inappropriate treatment and financial strain on patients.
    • Overuse of antibiotics based on Widal test results contributes to antimicrobial resistance, exacerbating the challenge of treating typhoid.

    PYQ:

    [2016] Which of the following statements is/are correct?

    Viruses can infect

    1. Bacteria

    2. Fungi

    3. Plants

    Select the correct answer using the code given below.

    (a) 1 and 2 only

    (b) 3 only

    (c) 1 and 3 only

    (d) 1, 2 and 3

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  • Innovations in Biotechnology and Medical Sciences

    CRISPR’s Breakthrough in Treating Blindness

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: LCA, CRISPR Cas9;

    Mains level: NA

    Why in the news?

    Scientists have successfully used CRISPR-Cas9 gene editing to restore vision in individuals with a rare form of inherited or congenital blindness.

    • The groundbreaking clinical trial, named “BRILLIANCE,” demonstrated promising results in improving vision and quality of life for participants with Leber congenital amaurosis (LCA), a severe vision disorder.

    What is Leber Congenital Amaurosis (LCA)?

    • LCA is a rare genetic disorder that primarily affects the retina the ‘light-sensitive’ tissue at the back of the eye. It leads to severe visual impairment or blindness at birth or within the first few months of life.
    • It is inherited in an autosomal recessive manner, meaning a child needs to inherit one defective gene from each parent to develop the condition.
    • There are several genes associated with LCA, with mutations in at least 14 different genes known to cause the disorder.
    • These genes generally affect the development and function of photoreceptors or the retinal pigment.

    Key highlights of the BRILLIANCE trial:

    • The BRILLIANCE trial involved 12 adults and two children diagnosed with LCA, a condition characterized by early-onset vision loss.
    • Participants received a single dose of a CRISPR gene therapy called EDIT-101, designed to correct mutations in the CEP290 gene responsible for LCA.
    • In this case, CRISPR-Cas9 cuts out the faulty DNA segment in the CEP290 gene and replaces it with a healthy DNA sequence, restoring the function of the CEP290 protein crucial for vision.
    • Out of 14 participants, 11 experienced improved vision without serious side effects.

    Back2Basics: CRISPR-Cas9 Gene Editing

    • CRISPR-Cas9 stands for Clustered Regularly Interspaced Short Palindromic Repeats and CRISPR-associated protein 9.
    • It is a technology that allows geneticists and researchers to edit parts of the genome by altering sections of the DNA sequence.
    • Emmanuelle Charpentier and Jennifer Doudna’s work on CRISPR-Cas9 as a ‘molecular scissor’ earned them the 2020 Nobel Prize in chemistry.
    • The system consists of two key components:
    1. Cas9: This is the enzyme that acts like a pair of molecular scissors. It is responsible for cutting the DNA strand at a specific location, allowing for the removal, addition, or alteration of DNA at that site.
    2. Guide RNA (gRNA): This is a piece of RNA that is designed to find and bind to a specific sequence of DNA that matches its code. The gRNA guides the Cas9 enzyme to the exact spot in the genome where an edit is desired.
    • Mechanism:
      • The process begins with the design of a gRNA that matches the DNA sequence where an edit is needed.
      • Once inside the cell, the Cas9 enzyme and the gRNA form a complex that can identify and bind to the target DNA sequence.
      • The Cas9 then cuts the DNA at this location.
      • After the DNA is cut, the cell’s natural repair mechanisms can be harnessed to add or remove genetic material, or to make specific changes to the DNA.

     

    PYQ:

    [2019] What is Cas9 Protein that is often mentioned in news?

    (a) A molecular scissors used in targeted gene editing

    (b) A biosensor used in the accurate detection of pathogens in patients

    (c) A gene that makes plants pest-resistant

    (d) A herbicidal substance synthesized in genetically modified crops

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  • Wildlife Conservation Efforts

    Orangutan uses Plant to treat wound

    Prelims Onlyworld map | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Orangutan and its natural habitat

    Mains level: NA

    Why in the news?

    An orangutan was observed treating a wound with medicine from a tropical plant, showcasing how some animals employ natural remedies to alleviate their ailments.

    • This behavior, documented in a recent study published in Scientific Reports, represents a novel instance of self-medication among wild animals.

    About Orangutans

    • Orangutans, are distinguished by their vivid red fur, are the largest arboreal mammals and spend the majority of their time in trees and forests.
    • The name “orangutan” translates to “man of the forest” in Malay.
    • They possess long, powerful arms and grasping hands and feet that facilitate movement through the branches.
    • Highly intelligent, these great apes share 96.4% of genetic makeup of modern man.
    • Orangutans primarily inhabit the tropical rainforests of Southeast Asia, specifically on the islands of Borneo and Sumatra.
    • Conservation Status: Critically Endangered (IUCN Red list)
    • Population: Bornean (Approximately 104,700); Sumatran (Approximately 13,846); Tapanuli (Around 800);
    • Behavioral Features:
      • These apes lead mostly solitary lives in the lowland forests, dining on wild fruits such as lychees, mangosteens, and figs, and drinking water collected in tree cavities.
      • Orangutans are mainly frugivorous, they primarily eat fruits, and consume leaves, bark, insects, and occasionally small animals.
      • They construct nests in trees with vegetation for sleeping at night and resting during the day.
      • And, now they are found treating a wound with medicine from a Tropical plant.

    PYQ:

    [2013] Consider the following:

    1. Star tortoise
    2. Monitor lizard
    3. Pygmy hog
    4. Spider monkey

    Which of the above are naturally found in India?

    (a) 1, 2 and 3 only

    (b) 2 and 3 only

    (c) 1 and 4 only

    (d) 1, 2 and 3 and 4

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  • RBI Notifications

    CBDC pilot programmes for CPs, CDs likely: RBI

    Prelims Only | Economics | Mains Paper 3: Indian Economy

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: CBDC, CPs, CDs;

    Mains level: NA

    Why in the news?

    RBI Governor Shaktikanta Das unveiled plans for a pilot program targeting the wholesale segment of Central Bank Digital Currency (CBDC) focusing on commercial papers (CPs) and certificates of deposits (CDs).

    What is Central Bank Digital Currency (CBDC)?

    • CBDC is a legal tender to be issued by the central bank in digital form; like rupee notes or coins, which are in physical form.
    • It was announced in the Union Budget 2022-23.
    • Subsequently, the Government amended Section 22 of the RBI Act, 1934 through the Finance Bill 2022. [Ref].
    • Working of CBDC:
      • Like fiat currency, it can also be exchanged between people. Simply, put it’s just like rupee (₹) notes but in digital form (e₹). 
      • However, unlike fiat currency that’s usually stored in banks and hence their liability, CBDC is a liability on the RBI’s balance sheet.
      • That’s why one does not necessarily need to have a bank account to own a digital rupee.

     

    About Commercial Papers (CPs) and Certificates of Deposits (CDs)

    Commercial Papers Certificates of Deposits
    Type of Instrument Unsecured promissory note Fixed-income financial instrument
    Issuer Large corporations, primary dealers, financial institutions Scheduled Commercial Banks, All-India Financial Institutions
    Maturity Period 1 to 364 days 3 months to 1 year (for SCBs), 1 to 3 years (for financial institutions)
    Minimum Investment Rs. 5 lakh or multiples thereof Rs. 1 lakh or multiples thereof
    Credit Rating Requirement Minimum credit rating required (e.g., A-2) from recognized rating agencies Typically issued by highly rated banks and financial institutions
    Collateral Unsecured Not applicable
    Purpose Short-term funding for corporations Short to mid-term investment for individuals and institutions
    Interest Rate Typically higher than bonds, fluctuates with market conditions Typically fixed, higher than savings accounts, fluctuates with market conditions
    Investment Eligibility Individuals, banking companies, corporate bodies (registered or incorporated in India), NRIs, FIIs, etc. Individuals, banking companies, other corporate bodies, NRIs, FIIs, etc.
    Issuing and Paying Agent (IPA) Only scheduled banks act as Issuing and Paying Agent Not applicable
    Trading Actively traded in Over-the-Counter (OTC) market, reported on Fixed Income Money Market and Derivatives Association of India (FIMMDA) reporting platform Not publicly traded
    Dematerialized Holding Can be held in dematerialized form through Securities and Exchange Board of India (SEBI)-approved depositories Can be issued in dematerialized form through SEBI-approved depositories

     

    With inputs from: https://www.indiainfoline.com

    PYQ:

    [2020] With reference to the Indian economy, consider the following statements:

    1. ‘Commercial Paper’ is a short-term unsecured promissory note.
    2. ‘Certificate of Deposit’ is a long-term instrument issued by the Reserve Bank of India to a corporation.
    3. ‘Call Money’ is a short-term finance used for interbank transaction.
    4. ‘Zero-Coupon Bonds’ are the interest-bearing short-term bonds issued by the Scheduled Commercial Banks to corporations.

    Which of the pairs above is/are correctly matched?

    (a) 1 and 2 only

    (b) 4 only

    (c) 1 and 3 only

    (d) 2, 3 and 4 only

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  • Innovations in Biotechnology and Medical Sciences

    Magnetic Resonance Imaging (MRI) and the Science behind

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: MRI and its working principle

    Mains level: NA

    Why in the news?

    • Magnetic Resonance Imaging (MRI) revolutionized medical diagnostics, offering non-invasive insights into soft tissues.
    • The pioneering efforts of Paul Lauterbur and Peter Mansfield led to its commercialization, earning them the Nobel Prize in Medicine in 2003.

    What is MRI?

    • Magnetic resonance imaging (MRI) is a non-invasive diagnostic procedure used to obtain detailed images of soft tissues within the body.
    • It is particularly valuable for imaging sophisticated structures like the brain, cardiovascular system, spinal cord, joints, muscles, liver, and arteries.
    • MRI is instrumental in diagnosing and monitoring various conditions, including cancer, neurological disorders (such as Alzheimer’s and stroke), and cardiovascular diseases.
    • Functional MRI (fMRI) can also assess brain activity by monitoring changes in blood flow.

    Working Principle:

    • MRI utilizes the magnetic properties of hydrogen atoms (one proton with one electron around it), which are abundant in water and fat molecules found throughout the body.
    • The MRI machine generates a powerful magnetic field, aligning hydrogen atoms within the body.
    • Radiofrequency pulses are then applied, causing hydrogen atoms to absorb energy and emit signals.
    • These emitted signals are detected by sensors and processed by a computer to create detailed images of the body’s internal structures.

    Components of an MRI Machine:

    The MRI machine consists:

    • Superconducting Magnet: Large magnet (superconducting magnet) that produces a powerful and stable magnetic field.
    • Gradient Coils: Gradient magnets produce smaller magnetic fields with varying strengths and directions, allowing for precise imaging of specific body areas.
    • Radiofrequency Coils: This emit radiofrequency pulses to excite hydrogen atoms in the body. The frequency of pulse the ‘excess’ atoms have to absorb is called the Larmor frequency.
    • Detectors: It capture emitted signals from hydrogen atoms and convert them into image data for analysis.

    Advantages of MRI:

    • High-Resolution Imaging: MRI offers high-resolution imaging with excellent tissue contrast, allowing for accurate diagnosis and treatment planning.
    • Versatile Viewing Angles: It can visualize structures from various angles without the need for repositioning, providing comprehensive information.
    • Safety and Non-Invasiveness: MRI scans are non-invasive and do not involve ionizing radiation, making them safe for repeated use.
    • Enhanced Image Quality: Contrast agents can enhance image quality by highlighting specific tissues or abnormalities.

    Limitations of MRI:

    • High Costs: MRI machines are expensive to purchase and maintain, resulting in high healthcare costs for patients.
    • Requirement for Patient Stillness: Patients undergoing MRI scans must remain still for extended periods to prevent image distortion, which can be challenging for some individuals.
    • Discomfort or Anxiety: The strong magnetic fields and loud noises produced during MRI scans may cause discomfort or anxiety for patients.
    • Limitations with Metallic Implants: Certain metallic implants or objects can interfere with MRI scans, limiting their use in individuals with such implants.

    PYQ:

    [2020] With the present state of development, Artificial Intelligence can effectively do which of the following?

    1. Bring down electricity consumption in industrial units
    2. Create meaningful short stories and songs
    3. Disease diagnosis
    4. Text-to-Speech Conversion
    5. Wireless transmission of electrical energy

    Select the correct answer using the code given below:

    (a) 1, 2, 3 and 5 only

    (b) 1, 3 and 4 only

    (c) 2, 4 and 5 only

    (d) 1, 2, 3, 4 and 5

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  • Innovations in Biotechnology and Medical Sciences

    Role of Fusobacterium in Colorectal Cancer

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Fusobacterium nucleatum animalis (Fna)

    Mains level: NA

    Why in the news?

    • Researchers at the Fred Hutchinson Cancer Center in the US have identified specific subtypes of Fusobacterium nucleatum associated with colorectal cancer (CRC) tumors.
    • These subtypes, particularly Fusobacterium nucleatum animalis (Fna), have been found in relatively higher quantities in CRC tumors.

    About Fusobacterium nucleatum

    • Fusobacterium nucleatum is a species of bacteria commonly found in the human mouth.
    • It is a gram-negative anaerobic bacterium, meaning it does not require oxygen for growth.
    • While typically residing in the oral cavity, it has been associated with various diseases and conditions, including periodontal diseases and colorectal cancer.

    Association with Colorectal Cancer (CRC):

    • In cases of colorectal cancer (CRC), Fusobacterium nucleatum has been found within tumors in the gut.
    • Studies have shown that this bacterium can aid cancer cells in evading the immune system and promoting metastasis, or the spread of cancer to other parts of the body.
    • Its presence in CRC tumors has led to investigations into its potential role in the development and progression of colorectal cancer.

    Impact:

    • Assisting cancer cells in evading the immune system.
    • Promoting inflammation and creating an environment conducive to tumor growth.
    • Facilitating metastasis by interacting with cancer cells and promoting their spread to other tissues.

    PYQ:

    [2013] Improper handling and storage of cereal grains and oilseeds result in the production of toxins known as Aflatoxins which are not generally destroyed by normal cooking process. Aflatoxins are produced by:

    (a) Bacteria

    (b) Protozoa

    (c) Moulds

    (d) Viruses

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  • Wildlife Conservation Efforts

    Mass Coral Bleaching in Lakshadweep Sea

    Prelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Marine heatwave, Coral Bleaching, Agatti Reef, DHW Indicator

    Mains level: NA

    The Agatti Reef is experiencing unprecedented mass coral bleaching.
    The Agatti Reef is experiencing unprecedented mass coral bleaching.

    Why in the news?

    Extreme heatwaves along the Indian coast, coupled with marine heatwaves, have triggered Mass Coral Bleaching events in the Lakshadweep Sea.

    Heatwaves Toll on Lakshadweep’s Coral:

    Researchers from the ICAR-Central Marine Fisheries Research Institute (CMFRI) conducted surveys across various Lakshadweep Islands.

      • The Degree Heating Week (DHW) indicator in Lakshadweep has soared above 4 °C-weeks, as per the National Oceanic and Atmospheric Administration (NOAA).
        • This elevation in DHW levels poses a substantial risk of coral bleaching, posing a severe threat to the region’s marine ecosystems.
    • Should DHW surpass 12 °C-weeks, it could trigger an unprecedented biodiversity crisis, leading to multispecies mortality.
    • Prolonged marine heatwaves since October 2023 have inflicted substantial stress on the coral reefs, exacerbating bleaching phenomena.
      • A marine heatwave is characterized by seawater temperatures exceeding a seasonally-varying threshold (often the 90th percentile) for at least 5 consecutive days.
    Degree Heating Week (DHW) indicator: It is a measurement used to assess the accumulated thermal stress that corals experience over an extended period, which can lead to coral bleaching. This indicator is expressed in °C-weeks, reflecting the exposure of coral reefs to elevated sea surface temperatures.

    Lakshadweep’s Coral Treasure: Agatti Reef

    • Agatti Island is part of the Lakshadweep archipelago, situated in the Arabian Sea.
    • The island is surrounded by extensive coral reefs, making it a popular destination for snorkeling and diving enthusiasts.
    • The coral reefs around Agatti Island are composed of various coral species, including branching corals like Acropora, table corals like Acropora Hyacinthus, and massive corals like Porites.
    • These corals form intricate reef structures that provide habitat and food for numerous marine organisms.

    What causes Coral Bleaching?

    • When exposed to conditions like heat stress, pollution, or high levels of ocean acidity, the zooxanthellae start producing reactive oxygen species not beneficial to the corals.
    • So, the corals kick out the colour-giving algae from their polyps, exposing their pale white exoskeleton and leading to coral starvation as corals cannot produce their own food.
    • Severe bleaching and prolonged stress in the external environment can lead to coral death.

    Back2Basics: Corals

    • Coral are made up of genetically identical organisms called polyps.
    • These polyps have microscopic algae called zooxanthellae living within their tissues in a mutualistic relationship.
    • The coral provides the zooxanthellae with the compounds necessary for photosynthesis.
    • In return, the zooxanthellae supply the coral with organic products of photosynthesis, like carbohydrates, which are utilized by the coral polyps for synthesis of their calcium carbonate skeletons.
    • Corals are marine invertebrates or animals which do not possess a spine.
    • They are the largest living structures on the planet.
    • Each coral is called a polyp and thousands of such polyps live together to form a colony, which grow when polyps multiply to make copies of themselves.
    • Coral reefs are also called the “rainforests of the seas”.

    Types of Coral

    Corals are of two types — hard corals and soft corals:

    1. Hard corals extract calcium carbonate from seawater to build hard, white coral exoskeletons. Hard corals are in a way the engineers of reef ecosystems and measuring the extent of hard coral is a widely-accepted metric for measuring the condition of coral reefs.
    2. Soft corals attach themselves to such skeletons and older skeletons built by their ancestors. Soft corals also add their own skeletons to the hard structure over the years. These growing multiplying structures gradually form coral reefs.

    Conditions needed for Corals to Flourish

    • Extensive submarine platforms for the formation of colonies by the coral polyps (not more than 90m below sea level).
    • High mean annual temperature ranging 20-21 degree Celsius.
    • Clean sediment-free water because muddy water or turbid water clogs the mouths of coral polyps resulting into their death.
    • Oceanic salinity ranging between 27-30 ppt.
    • Ocean currents and waves, as they bring food supply for the polyps.

     

    PYQ:

    2014: Which of the following have coral reefs?

    1. Andaman and Nicobar Islands
    2. Gulf of Kachchh
    3. Gulf of Mannar
    4. Sunderbans

    Select the correct answer using the code given below:

    (a) 1, 2 and 3 only

    (b) 2 and 4 only

    (c) 1 and 3 only

    (d) 1, 2, 3 and 4

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  • Innovations in Biotechnology and Medical Sciences

    West Nile Fever Outbreak in Kerala 

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: West Nile Virus, Its host, Transmission;

    Mains level: NA

    Why in the news?

    • The Kerala government disclosed the re-emergence of West Nile fever cases in Thrissur, Malappuram, and Kozhikode districts.
    • West Nile fever was first detected in Kerala in 2011, with a fatal case recorded in 2019 involving a six-year-old from Malappuram.

    What is West Nile Fever?

    • West Nile fever is caused by a West Nile Virus (WNV) transmitted through bites from infected Culex mosquitoes.
    • The WNV is a mosquito-borne, single-stranded RNA virus.
    • According to the WHO, it is a member of the flavi-virus genus and belongs to the Japanese Encephalitis antigenic complex of the family Flaviviridae.

    How does it spread?

    • It is transmitted by infected mosquitoes between and among humans and animals, including birds, which are the reservoir host of the virus.
    • Mosquitoes become infected when they feed on infected birds, which circulate the virus in their blood for a few days.
    • The virus eventually gets into the mosquito’s salivary glands.
    • During later blood meals (when mosquitoes bite), the virus may be injected into humans and animals, where it can multiply and possibly cause illness.
    • WNV can also spread through blood transfusion, from an infected mother to her child, or through exposure to the virus in laboratories.
    • It is not known to spread by contact with infected humans or animals.

    Symptoms of WNV infection:

    • The disease is asymptomatic in 80% of the infected people.
    • The rest develop what is called the West Nile fever or severe West Nile disease.
    • In these 20% cases, the symptoms include fever, headache, fatigue, body aches, nausea, rash, and swollen glands.

    PYQ:

    [2017] Consider the following statements:

    1. In tropical regions, Zika virus disease is transmitted by the same mosquito that transmits dengue.

    2. Sexual transmission of Zika virus disease is possible.

    Which of the statements given above is/are correct?

    (a) 1 only

    (b) 2 only

    (c) Both 1 and 2

    (d) Neither 1 nor 2

     

    Back2Basics: Type of Viruses 

    Subtypes Description Examples
    DNA Viruses Herpesviruses DNA viruses with a complex structure causing various diseases including cold sores, chickenpox, and mononucleosis. HSV-1, HSV-2, VZV, EBV
    Papillomaviruses DNA viruses associated with warts and certain cancers. HPV
    Adenoviruses DNA viruses causing a wide range of infections in humans. Adenovirus types causing respiratory, gastrointestinal, and ocular infections
    Poxviruses Large, complex DNA viruses responsible for diseases like smallpox. Variola virus (smallpox), Vaccinia virus
    RNA Viruses Positive-Sense RNA Viruses RNA viruses with genomes that can directly serve as mRNA, causing diseases like the common cold, Zika, and COVID-19. Picornaviruses, Flaviviruses, Coronaviruses
    Negative-Sense RNA Viruses RNA viruses requiring transcription into positive-sense RNA before translation, causing diseases like influenza and rabies. Orthomyxoviruses, Paramyxoviruses, Rhabdoviruses
    Retroviruses RNA viruses that use reverse transcriptase to integrate their genome into the host cell’s DNA. HIV, HTLV
    Double-Stranded RNA (dsRNA) Viruses RNA viruses with double-stranded RNA genomes causing gastroenteritis and other infections. Reoviruses
    Single-Stranded RNA (ssRNA) Viruses with Ambisense Genome RNA viruses with genomes containing both positive-sense and negative-sense RNA regions. Arenaviruses, Bunyaviruses
    Single-Stranded RNA (ssRNA) Viruses with Segmented Genome RNA viruses with genomes consisting of multiple segments, causing diseases like influenza and hemorrhagic fevers. Orthomyxoviruses, Bunyaviruses
    Single-Stranded RNA (ssRNA) Viruses with Circular Genome Satellite viruses with a circular RNA genome requiring helper viruses for replication. Hepatitis Delta Virus (HDV)
    Enveloped Viruses Influenza Viruses RNA viruses surrounded by a lipid envelope causing seasonal flu outbreaks. Influenza A, B, C viruses
    Herpesviruses Enveloped DNA viruses causing diseases like cold sores, chickenpox, and mononucleosis. HSV-1, HSV-2, VZV, CMV
    Coronaviruses Enveloped RNA viruses causing diseases like severe acute respiratory syndrome (SARS) and COVID-19. SARS-CoV, MERS-CoV, SARS-CoV-2
    HIV Enveloped retroviruses responsible for acquired immunodeficiency syndrome (AIDS). Human immunodeficiency virus
    Ebola Virus Enveloped RNA virus causing severe hemorrhagic fever in humans. Ebola virus
    Non-enveloped Viruses Adenoviruses DNA viruses lacking a lipid envelope, causing various infections in humans. Adenovirus types causing respiratory, gastrointestinal, and ocular infections
    Papillomaviruses DNA viruses associated with warts and certain cancers, lacking an envelope. HPV
    Noroviruses RNA viruses causing gastroenteritis, lacking an envelope. Norovirus
    Rotaviruses RNA viruses causing severe gastroenteritis in infants and young children, lacking an envelope. Rotavirus
    Bacteriophages T4 Bacteriophage Viruses that infect bacteria, with a complex structure and lifecycle. T4 bacteriophage
    Lambda Phage Temperate bacteriophage capable of lysogenic and lytic cycles in E. coli. Lambda phage

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  • Forest Fires

    Uttarakhand Forest Fires

    DOMRPrelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Forest Fires as per FSI report

    Mains level: NA

    Why in the News?

    Last week, three instances of forest fire were reported from the major forest belts in Uttarakhand.

    • The severity of the situation has prompted the deployment of Indian Air Force personnel and Mi-17 choppers, engaged in the critical operation of dousing the flames using the Bambi Bucket Method.

    Causes of Wildfire:

    • Firstly, the general major causes of forest fires in Uttarakhand are continued dry weather and lack of moisture in the forests.
    • Secondly, according to the Forest Research Institute (FRI, 2019), 95% of forest fires are attributed to human activities.
    • The common human-induced causes include – Grazers setting fire to dry grass, Slash-and-burn agriculture, Unattended campfires, and Intentional arson.

    Uttarakhand’s Forest Vulnerability:

    • As per the latest report from the Forest Survey of India (FSI), the Recorded Forest Area (RFA) in the State is 38,000 sq km of which 26,547 sq km is Reserved Forest, 9,885 sq km is Protected Forest, and 1,568 sq km is Unclassed Forests.
    • Highly flammable Chir Pine trees, covering extensive areas, increase the fire risk.
    • This risk is compounded by prolonged dry spells and excess biomass accumulation.
    • Additionally, the proximity of villages facilitates anthropogenic activities such as forest clearance and grazing.

    Forest Fires in India: Recent Statistics

    • Odisha recorded 4,237 forest fires as compared to 1,499 between April 20 and 27 in 2023. Similarly, Chhattisgarh recorded 757 fires last year as compared to 2,116 this year, Jharkhand 633 as against 1,926 and Andhra Pradesh 527 as compared to 1,126 in 2023.
    • However, Uttarakhand has recorded the highest number of large forest fires in the country in the last seven days since April 28, according to the Forest Survey of India (FSI) data.

     

    Mitigation Strategies

    1. Localized Initiatives: 
    • Effective measures to mitigate forest fire risks include controlled burning, biomass removal, prescribed burns, and enhanced surveillance using drones.
    • Community engagement and proactive involvement, as demonstrated in Kerala, provide valuable insights for forest fire management.
    1. Government Initiatives:
    • The government has introduced measures such as a satellite-based fire alert system by the Forest Survey of India, aiding in early detection and response efforts.
    • Forest staff utilize various techniques, including counter-fires and fire beaters, to contain and manage forest fires effectively.

    Wildfires Mitigating Strategies:

    • The Ministry of Environment, Forest and Climate Change (MoEFCC) outlines four strategies to prevent and manage forest fires:
    1. Erecting watch towers for early detection,
    2. Deploying fire watchers,
    3. Engaging local communities, and
    4. Establishing and maintaining fire lines.

    The National Disaster Management Authority (NDMA) website distinguishes between two types of fire lines:

    1. Kachha fire lines involve clearing undergrowth and shrubs while preserving trees to decrease the amount of available fuel.
    2. Pucca fire lines are clear-cut areas that create a barrier between forest compartments or blocks to contain potential fire spread.

     

    PYQ:

    [2020] Examine the status of forest resources of India and its resultant impact on climate change.

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  • Global Geological And Climatic Events

    Catatumbo Lightning: A Torrent of Current

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Catatumbo Lightning

    Mains level: NA

    Why in the news?

    Catatumbo lightning is a natural event seen over the Catatumbo River in Venezuela, where lightning strikes almost nonstop.

    What is Catatumbo Lightning?

    • Catatumbo Lightning is an atmospheric phenomenon that occurs over the Catatumbo River in Venezuela.
    • It specifically occurs at the Catatumbo Delta, where the river meets Lake Maracaibo.
    • It is known as one of the world’s largest lightning displays.
    • This natural spectacle involves frequent and nearly continuous lightning strikes that illuminate the night sky, creating a mesmerizing light show.
    • Catatumbo Lightning is most prevalent during the wet season, typically from April to November.
    • The consistent and abundant lightning activity has earned the region the moniker “the lightning capital of the world.”

    Factors behind Catatumbo Lightning

    • Weather Dynamics
    • Warm, moisture-laden air from the Caribbean Sea clashes with cooler air descending from the Andes mountains, creating a dynamic interplay of atmospheric forces.
    • This collision, accentuated by the local landscape, triggers rapid upward movement of warm air, leading to the formation of towering cumulonimbus clouds.
    • Electrical Charge Generation
    • Strong winds and temperature differentials within these clouds generate electrical charges.
    • Cumulonimbus clouds, towering over 5 km high, accumulate vast amounts of static electricity.
    • Lightning Discharge: When the electrical potential within the clouds reaches a critical level, it discharges in the form of lightning strikes.

    Characteristics of Catatumbo Lightning

    • Catatumbo lightning occurs on approximately 160 nights annually, exhibiting a remarkable longevity.
    • At its peak, the phenomenon generates an astonishing average of 28 lightning strikes per minute.

    PYQ:

    [2013] During a thunderstorm, the thunder in the skies is produced by the

    1. Meeting of cumulonimbus clouds in the sky

    2. Lightning that separates the nimbus clouds

    3. Violent upward movement of air and water particles

    Select the correct answer using the codes given below:

    (a) 1 only

    (b) 2 and 3

    (c) 1 and 3

    (d) None of the above produces the thunder

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  • New Species of Plants and Animals Discovered

    Scintillating Sea Creatures and their Uniqueness

    Prelims OnlySpecies | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Scintillating Sea Creatures mentioned in the newscard

    Mains level: NA

     

    Why in the News?

    “Scintillating” means sparkling or shining brightly, often used metaphorically to describe something lively, exciting, or brilliantly clever.

    Species Description Notable Features IUCN Status
    Seahorses

    		 Small, dragon-like creatures inhabiting tropical seas.
    • Vibrant colors and intricate camouflage
    • Unique parenting style with male nurturing eggs
    		 Status: Near Threatened
    Mantis Shrimp

     

    		 Colorful crustaceans found in tropical waters, known for hunting prowess.
    • Impressive stabbing or punching abilities
    • Display familial bonds
    		 Status: Least Concerned
    Octopus

    		 Highly intelligent marine creatures with a wise demeanor.
    • They have three functioning hearts.
    • Venomous beaks and powerful suckers.
    • Solitary nature, adept at camouflage
    		 Status: Least Concerned

    Recently, marine scientists have discovered a new Octopus nursery off the coast of Costa Rica.
    Starfish

    		 Also known as sea stars, possess remarkable regenerative abilities.

    Starfish have two stomachs – the pyloric and the cardiac stomach.
    • Each arm contains vital organs.
    • Starfish belongs to the phylum Echinodermata group. Echinodermata are so named owing to their spiny skin
    • They have a unique feeding method involving stomach extrusion.
    		 Status: The Sunflower sea star (Pycnopodia helianthoides) is Critically Endangered.
    Hermit Crabs

    		 Resourceful creatures use discarded shells for shelter.
    • They use empty snail shells or other hollow objects as a shelter for partial containment and protection of the body.
    • Hermit crabs occur in sandy- or muddy-bottomed marine waters and occasionally on land and in trees.
    • Status: Least Concerned
    • The majority of terrestrial hermit crab species worldwide have used trash as shells, according to a recent study by experts.

     

    PYQ:

    [2013] Consider the following animals

    1. Sea cow
    2. Sea horse
    3. Sea lion

    Which of the above is/are mammal/mammals?

    (a) 1 only

    (b) 1 and 3 only

    (c) 2 and 3 only

    (d) 1, 2 and 3

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  • Water Management – Institutional Reforms, Conservation Efforts, etc.

    Shellfish Aquaculture for Water Remediation

    Prelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Geukensia demissa

    Mains level: NA

    Why in the news?

    Shellfish aquaculture using Geukensia demissa is emerging as a viable solution for mitigating excess nutrients and contaminants in coastal and estuarine waters.

    About Geukensia demissa

    • Geukensia demissa is a species of mussel commonly known as the ribbed mussel or Atlantic ribbed mussel. 
    • It is native to the Atlantic coast of North America, ranging from Nova Scotia in Canada to the Gulf of Mexico.
    • They inhabit intertidal and shallow subtidal areas, typically found in estuaries, salt marshes, and tidal flats.
    • They prefer areas with muddy or sandy substrates where they can burrow and anchor themselves.

    Ecological Importance

    Ribbed mussels play a vital role in estuarine ecosystems.

    • Water Filtration: They filter large volumes of water, helping to improve water quality by removing suspended particles and excess nutrients.
    • Key species of Food Chain: Additionally, their presence provides habitat and food for various other organisms, including small invertebrates and fish.
    • Organisms Filter: These mussels thrive in diverse habitats and possess the ability to filter bacteria, microalgae, and detritus laden with nutrients and contaminants.

    Geukensia demissa: Experimental Deployment and Results

    • To assess the efficacy of G. demissa in purifying urban waters, a raft stocked with local ribbed mussels was deployed in an estuary near New York City.
    • Subsequent analysis revealed that the mussels exhibited robust health and accumulated significant amounts of local nitrogen isotopes, indicative of nitrogen removal from the water.
    • Based on the findings, it is estimated that a fully stocked raft could purify an average of 11,356 m3 of water daily and remove approximately 159 kg of particulate matter on a daily basis.
    • Moreover, upon harvesting, the mussels sequestered 62.6 kg of nitrogen in their tissues and shells, further enhancing the water quality.

     

    PYQ:

    [2011] Recently, “oil-zapper” was in the news. What is it?

    (a) It is an eco-friendly technology for the remediation of oily sludge and oil spills

    (b) It is the latest technology developed for under-sea oil exploration

    (c) It is a genetically engineered high biofuel-yielding maize variety

    (d) It is the latest technology to control the accidentally caused flames from oil wells

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