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  • Arsenic Toxicity in Rice Cultivation

    Why in the News?

    A recent study has revealed that the composition of microbial communities in rice paddies critically determines the buildup of arsenic compounds in rice grains.

    Arsenic Toxicity in Agriculture:

    • Overview: Arsenic (As) is a potent carcinogen and phytotoxin, bioaccumulating in rice and posing severe health and agronomic risks in Asian paddies.
    • Mechanism in Flooded Fields: Under anaerobic conditions, microbes convert arsenic into soluble, bioavailable forms that rice roots readily absorb.
    • Toxic Compounds: Organic forms like dimethylarsinic acid (DMA) and dimethylated monothioarsenate (DMMTA) cause straighthead disease, producing sterile, erect panicles and yield losses up to 70 %.
    • Speciation vs. Concentration: Toxicity depends on arsenic speciation, not total soil As levels, even low-As soils may cause poisoning.
    • Geographic Hotspots: Severe in West Bengal, Bihar, and Bangladesh, where arsenic-laden groundwater is used for irrigation.

    About Soil Age and Microbial Composition:

    • Research Insight: Study by Peng Wang (Nanjing Agricultural University) shows soil age dictates microbial dominance and arsenic behaviour.
    • Young Soils (< 700 yrs): Dominated by arsenic-methylating bacteria that convert inorganic As into toxic organic forms (DMA, DMMTA).
    • Old Soils (> 700 yrs): Rich in demethylating archaea that detoxify As by breaking down methylated compounds.
    • Global Microbiome Survey: Across 801 paddy soils, identified 11 methylators and 6 demethylators as key toxicity predictors.
    • Risk Threshold: When methylator: demethylator ratio > 1.5, probability of straighthead disease rises sharply.

    How does Microbial balance govern Arsenic toxicity?

    • Biological Equilibrium: Arsenic toxicity depends on balance between methylating bacteria (risk) and demethylating archaea (detoxification).
    • Environmental Triggers: Flood duration, oxygen, temperature, and hydrological shifts can tilt this balance toward higher toxicity.
    • Mitigation Measures: Mid-season drainage, silicon fertilisation, and microbial community management restore redox balance and reduce As uptake.
    [UPSC 2013] Which of the following can be found as pollutants in the drinking water in some parts of India?

    1. Arsenic 2. Sorbitol 3. Fluoride 4. Formaldehyde 5. Uranium

    Select the correct answer using the codes given below.

    Options: (a) 1 and 3 only (b) 2, 4 and 5 only (c) 1, 3 and 5 only* (d) 1, 2, 3, 4 and 5

     

  • Status of Elephants in India Report (2025)

    Why in the News?

    The Wildlife Institute of India (WII) released its report “Status of Elephants in India” on October 14, 2025, marking the country’s first-ever DNA-based elephant population estimation.

    Elephants in India:

    • Overview: Elephas maximus, Asian Elephant, listed as Endangered (IUCN); protected under Schedule I of the Wildlife (Protection) Act 1972 and Appendix I of CITES.
    • National Importance: India sustains over 60 % of the global wild Asian elephant population, making it a global conservation stronghold.
    • Conservation Framework:
      • Project Elephant (1992) – habitat protection, research, corridor restoration, and conflict management.
      • Elephant Reserves – 33 notified across 15 states, covering ~80,000 sq km.
      • Corridor Initiatives – joint mapping of ~101 corridors by WII, WWF-India, and WTI to ensure genetic connectivity.
    • Major Landscapes:
      • Western Ghats – dense forests with corridor fragmentation.
      • North-Eastern Hills – contiguous habitats under human pressure.
      • Central India & Eastern Ghats – isolated herds with high conflict.
      • Shivalik–Gangetic Plains – corridor bottlenecks amid dense settlements.
    • Ecological Role: Elephants act as ecosystem engineers, dispersing seeds, maintaining forest–grassland balance, and regulating hydrology.

    About Status of Elephants in India Report (2025):

    • Publisher & Framework: Released by the Wildlife Institute of India (WII) under Project Elephant. It employs, for the first time in India, a DNA-based mark–recapture (genetic) estimation method for elephant census.
    • Census Period & Title: Conducted between 2021–2025, termed the Synchronous All-India Population Estimation of Elephants (SAIEE 2021-25).
    • Feature: Combines genetic sampling, field transects, and spatial-capture–recapture modelling.
    • Scientific Advancement: Establishes India’s first genetic reference library for elephants, linking individuals, herds, and landscapes for improved long-term monitoring.
    • Policy Context: Conducted under Project Elephant (1992) to align with national targets for corridor protection, conflict mitigation, and ecosystem restoration.

    Key Highlights:

    • Total Population (2025): 22,446 wild Asian elephants estimated nationwide using genetic data.
    • Previous Estimate (2017): About 29,964; apparent ~25 % drop due to new methodology rather than actual decline.
    • Regional Distribution:
      • Western Ghats Landscape: 11,934 (≈ 53 %)
      • North-East & Brahmaputra Plains: 6,559 (≈ 22 %)
      • Shivalik Hills & Gangetic Plains: 2,062 (≈ 9 %)
      • Central India & Eastern Ghats: 1,891 (≈ 8 %)
    • State-wise Concentration: Karnataka (6,013), Assam (4,159), Tamil Nadu (3,136), Kerala (2,785), Uttarakhand (1,792), Odisha (912).
    • Demographic Insights: DNA profiling enabled sex ratio identification, family linkages, and migration-corridor tracking, turning a static census into a dynamic population map.
    • Conservation Implications: WII urges genetic recensuses every 5 years, restoration of identified corridors, and integration of coexistence models in land-use planning.
    [UPSC 2020] With reference to Indian elephants, consider the following statements:

    1. The leader of an elephant group is a female.

    2. The maximum gestation period can be 22 months.

    3. An elephant can normally go on calving till the age of 40 years only.

    4. Among the States in India, the highest elephant population is in Kerala.

    Which of the statements given above is/are correct?

    Options: (a) 1 and 2 only * (b) 2 and 4 only (c) 3 only (d) 1, 3 and 4 only

     

  • What are Green Crackers?

    Why in the News?

    The Supreme Court of India has temporarily permitted the sale and bursting of green crackers in the Delhi–NCR region from October 18 to 21 for Diwali celebrations.

    Background and Judicial Origin:

    • Trigger: Severe air pollution episodes during Diwali (2016–2017) pushed Delhi’s Air Quality Index (AQI) beyond 500, creating a public-health emergency.
    • Supreme Court Intervention (2018):
      • Affirmed that cultural freedom cannot override the Fundamental Right to Life (Article 21).
      • Banned conventional firecrackers containing heavy metals such as barium, lead, and mercury.
      • Directed CSIR to develop less-polluting alternatives, with PESO (Petroleum and Explosives Safety Organisation) tasked to test and certify them.
    • Outcome: Introduction of green crackers as a compromise solution balancing festive traditions with public-health protection.
    • Legal Oversight: The Supreme Court continues to monitor compliance, permitting use only within fixed time windows and under strict emission-control standards.

    About Green Crackers:

    • Overview: Green crackers are eco-friendly fireworks developed by the Council of Scientific and Industrial Research – National Environmental Engineering Research Institute (CSIR-NEERI) to curb air pollution during festive celebrations.
    • Chemical Composition: Manufactured using modified formulations that exclude barium nitrate and significantly reduce sulphur and aluminium content, thereby cutting toxic emissions.
    • Emission Reduction: These crackers emit about 30 % less particulate matter (PM. and PM₁₀) and 10 % less sulphur dioxide (SO) and nitrogen oxides (NO) than conventional firecrackers.
    • Identification & Legality: Each authorised packet carries the Green Fireworks logo and a QR code verifiable through the CSIR-NEERI Green QR Code App; crackers without codes are illegal.
    • Purpose: Designed to retain the cultural and festive appeal of fireworks while mitigating health and environmental impacts in pollution-prone regions such as Delhi-NCR.

    Types of Green Crackers:

    1. SWAS (Safe Water Releasable): Releases water vapour during combustion to reduce dust and temperature, lowering particulate emissions.
    2. STAR (Safe Thermite Cracker): Uses thermite-based reactions instead of conventional oxidisers, producing bright light and sound with reduced toxic output.
    3. SAFAL (Safe Minimal Aluminium): Limits metallic fuel content, maintaining luminosity and sound intensity while reducing aluminium and sulphur emissions.

    All three maintain sound levels around 100–120 dB, comparable to traditional fireworks but with a cleaner emission profile and shorter atmospheric residence time.

    [UPSC 2024] What is the common characteristic of the chemical substances generally known as CL-20, HMX and LLM-105, which are sometimes talked about in media?

    (a) These are alternatives to hydro- fluorocarbon refrigerants

    (b) These are explosives in military weapons *

    (c) These are high-energy fuels for cruise missiles

    (d) These are propulsion fuels for rocket

     

  • [2025 GS1 UPSC MAINS] Explain briefly the ecological and economic benefits of solar energy generation in India with suitable examples. (10 Marks)

    [2025 GS1 UPSC MAINS] Explain briefly the ecological and economic benefits of solar energy generation in India with suitable examples. (10 Marks)

    Smash 2025 FLT 07 Q5.
    India has significant potential to lead the global renewable energy transition. Discuss the major opportunities and barriers in scaling up renewable energy infrastructure in India.
    PYQ
    Q. India has immense potential of solar energy though there are regional variations in its development. Elaborate. (2020)

    India, being a tropical country with 300 sunny days annually and high solar insolation (4–7 kWh/m²/day), has immense potential for solar energy. 

    Fact File:

    India ranks 3rd in Solar Power capacity, (IRENA RE Statistics 2025) with capacity of 1.08 GWhTotal solar energy potential stands at 748 GWh

    Ecological Benefits

    1. Reduced Greenhouse Gas Emissions – Solar is carbon-neutral during operation. Eg– Bhadla Solar Park (Rajasthan) avoids ~4 million tonnes of CO₂ annually.
    2. Air Quality Improvement – Cuts SO₂, NOx, particulate emissions from coal. Eg– NTPC Dadri has integrated solar to offset coal-based generation.
    3. Water Conservation – Thermal plants need 3–5 m³/MWh water; solar PV is nearly waterless.
    4. Reduced Land Pressure through Innovative Deployment – Rooftop, floating solar, and canal-top solar save agricultural land. Eg– Gujarat’s Narmada canal-top solar.
    5. Synergy with Agriculture – Agrivoltaics allow crops beneath panels, reducing water loss. Eg– Maharashtra pilot projects under PM-KUSUM scheme.
    6. Contributes to Climate Commitments – Key to India’s pledge of 50% power capacity from non-fossil sources by 2030.

    Economic Benefits

    1. Energy Security – Reduces fossil fuel imports.(2024–25: India imported 243 MMT coal)
    2. Cost Competitiveness – Tariffs now among the lowest globally (less than ₹3/unit ).
    3. Job Creation – Solar PV sector employed ~319,000 workers in 2023; total RE jobs ~1.02 million. Eg– CEEW projects 3.4 million clean energy jobs by 2030.
    4. Rural Empowerment – Solar pumps (PM-KUSUM) reduce diesel dependence and enhance farmer income. Eg– Over 2.3 lakh solar pumps installed by 2023.
    5. Boost to Domestic Manufacturing – Under PLI, India’s solar module manufacturing capacity crossed 74 GW in 2025, making it second globally.
    6. Foreign Exchange Savings – According to NITI Aayog, renewable energy expansion could reduce fossil fuel imports by up to $94 billion annually by 2030.
    7. Infrastructure Development & Local Growth – Large solar parks bring roads, transmission lines, and jobs to underdeveloped regions. Eg– Pavagada Solar Park (Karnataka)
    8. Energy Access & Decentralisation – Off-grid solar improves rural electrification.
    ChallengesWay Forward
    High import dependence on modules & cellsBoost domestic manufacturing (PLI scheme)
    Land acquisition issues for mega-parksPromote rooftop, canal-top, floating solar
    Intermittency & storage gapInvest in battery storage, hybrid RE projects
    Grid integration & transmission bottlenecksStrengthen Green Energy Corridors

    Solar energy offers a dual dividendecological sustainability and economic resilience. It is the backbone of India’s path toward green growth and energy transition.

  • [18th October 2025] The Hindu Op-ed: Better global governance led by China and India

    PYQ Relevance

    [UPSC 2023] Virus of Conflict is affecting the functioning of the SCO.” In the light of the above statement, point out the role of India in mitigating problems.

    Linkage: This PYQ is important as it tests India’s diplomatic balance within the SCO, amid regional rivalries. The article connects by showing how the Xi–Modi meeting and Global Governance Initiative reflect India’s role in restoring trust and strengthening multilateralism within the SCO framework.

    Mentor’s Comment

    As the world enters a phase of geopolitical churn and institutional fatigue, the call for a reformed, people-centric global governance system grows louder. The 75th anniversary of India-China diplomatic ties and the 80th year of the UN offer a historical moment: two Asian giants, once colonised, now rising powers, can redefine global order. For UPSC aspirants, this theme bridges multilateral diplomacy, global reforms, and India’s evolving foreign policy—key areas across GS Paper 2 and IR essays.

    Introduction

    The year 2025 marks a milestone in both bilateral and global history. India and China, home to over 2.8 billion people, commemorate 75 years of diplomatic relations, even as the United Nations celebrates its 80th anniversary. Against the backdrop of unilateralism and weakening multilateralism, the Global Governance Initiative (GGI) proposed by China, with India’s cooperation, offers a blueprint for a more equitable international order. As Asia’s two leading powers move from rivalry to partnership, their convergence could transform the world’s governance architecture, symbolising a decisive shift toward multipolarity and shared prosperity.

    Why is the India-China cooperation in 2025 a landmark moment?

    1. Historical Context: The two leaders, Xi Jinping and Narendra Modi, have met 18 times since 2014, an unprecedented frequency symbolising sustained engagement despite border tensions.
    2. Symbolic Restoration: The bilateral meeting at the 16th BRICS Summit in Kazan (2024) and now at the 25th SCO Summit in Tianjin (2025) reflects a conscious reset in relations.
    3. Global Expectation: Their 19th meeting during the Tianjin Summit is being seen globally as a moment to restore balance to multilateral decision-making, especially amid Western dominance fatigue.
    4. Public Diplomacy: Both sides emphasise “partners, not rivals,” signaling a shift from competition to cooperation.

    What is changing in the global governance discourse?

    1. Erosion of Trust: The early 21st century witnessed rising unilateralism, protectionism, and hegemonism, eroding faith in international institutions.
    2. UN at 80: The UN system, though foundational, now faces criticism for its limited representation of developing nations and sluggish response to global crises.
    3. Reform Imperative: The question before humanity is not just “who governs” but “how governance is shared.” The article highlights the need for reform without rupture, evolving existing systems rather than replacing them.
    4. Asia’s Moment: The decline of Western dominance and the rise of Asia and Eurasia are redefining the rules of the game, with India and China at the center.

    What is the Global Governance Initiative (GGI)?

    1. New Vision: The GGI, announced by President Xi at the Tianjin SCO Summit, aims to correct the deficit in global governance by promoting a fair, inclusive order.
    • Five Core Principles:
      1. Sovereign Equality: Respect for all nations’ independence and dignity; greater democracy in international relations.
      2. Rule of Law: Equal application of international law and rejection of double standards.
      3. Multilateralism: Strengthening the UN as the core platform for global decision-making.
      4. People-Centric Approach: Governance should prioritise well-being, safety, and fulfillment of citizens globally.
      5. Real Results Orientation: Developed nations must shoulder more responsibility, while developing nations must cooperate for shared solutions.
      6. Essence: The GGI is not about creating parallel institutions but reforming and improving existing ones to respond effectively to modern challenges.

    How can India-China cooperation strengthen multilateralism?

    1. Shared Responsibilities: Both countries, as major developing economies and SCO/BRICS members, bear the responsibility to defend international fairness and justice.
    2. Strategic Coordination: The leaders’ dialogue stresses communication on major international and regional issues to bridge divides in the Global South.

    Complementary Visions:

    1. China’s “community of shared future for mankind
    2. India’s “Vasudhaiva Kutumbakam” (One Earth, One Family, One Future)
    3. Together, they embody the moral and developmental leadership needed for a post-Western global order.
    4. Practical Gains: Resumption of direct flights, maintenance of border stability, and enhanced trade cooperation show concrete steps toward normalisation.

    What challenges lie ahead for India-China collaboration?

    1. Trust Deficit: Lingering border disputes and differing political models may slow strategic trust-building.
    2. Competing Ambitions: While both aspire to leadership in the Global South, perception management and narrative balance will be crucial.
    3. Western Reaction: The West may perceive India-China cooperation as a counterweight to transatlantic power, potentially complicating India’s strategic autonomy.
    4. Need for Institutionalisation: Long-term progress demands institutional mechanisms, track-II dialogues, multilateral coordination cells, and joint UN reform working groups.

    Conclusion

    The India-China partnership in 2025 signals more than a diplomatic milestone, it represents a potential rebalancing of world order. As the UN turns 80, the call for shared leadership between emerging powers grows urgent. If pursued with mutual trust and strategic maturity, the GGI-led collaboration can make the 21st century truly an Asian century rooted in equity, inclusivity, and sustainability. In a fractured world, cooperation, not competition, may be the only path to survival and progress.

  • Gorkhaland statehood, Government names ex-DY NSA as interlocutor

    Introduction

    India’s federal architecture is unique: it allows the creation of new states to accommodate cultural, linguistic, administrative, or developmental aspirations under Article 3 of the Constitution. Yet, every statehood movement also reflects deeper struggles over identity, representation, and development.

    The Gorkhaland issue, revived by the Centre’s recent move to appoint an interlocutor, is one of the oldest and most persistent among these. While it directly concerns the Darjeeling hills and adjoining areas of West Bengal, it mirrors similar aspirations voiced across India, from Vidarbha to Bodoland, Harit Pradesh, and Kukiland.

    The Gorkhaland Appointment: Why is this news significant?

    The Centre’s decision to name ex-Dy NSA Pankaj Kumar Singh as interlocutor for Gorkha talks is a politically charged step:

    1. First formal engagement in years: It revives official talks after a long hiatus, moving beyond ad hoc arrangements like the Gorkhaland Territorial Administration (GTA).
    2. High-level signalling: The appointment of a senior security expert signals that the government sees the issue as sensitive, with implications for internal security and electoral politics.
    3. Identity at stake: It concerns recognition of the Gorkha community’s distinct identity, and a permanent political solution to decades of protests and autonomy struggles.
    4. Pre-election dimension: With West Bengal Assembly elections approaching, the move is seen as an attempt to politically engage the hill electorate, which has historically swung between national and regional parties.
    5. Potential precedent: Success in structured dialogue may offer a model for addressing other regional aspirations through negotiation instead of agitation.

    Understanding the Gorkhaland Issue

    Historical Context

    1. Origins: The demand for Gorkhaland dates back to 1907, when the Hillmen’s Association first sought a separate administrative unit for the Nepali-speaking people of Darjeeling under British rule.
    2. Post-Independence Phase: With linguistic reorganisation (1950s), Nepali-speaking Gorkhas felt their identity was inadequately represented in Bengali-dominated West Bengal.
    3. 1980s Uprising: The movement, led by Subhash Ghising’s Gorkha National Liberation Front (GNLF), turned violent; it led to the creation of the Darjeeling Gorkha Hill Council (DGHC) in 1988 as a compromise.
    4. Second Wave: In 2007, Bimal Gurung formed the Gorkha Janmukti Morcha (GJM), renewing the demand; this led to the Gorkhaland Territorial Administration (GTA) in 2011, but unrest persisted.
    5. Present Phase: The latest talks under an interlocutor aim to find a “permanent political solution” and recognition of 11 sub-tribes as Scheduled Tribes.

    Key Demands

    1. Separate Gorkhaland State: Carved out of Darjeeling and parts of Kalimpong, to ensure administrative autonomy and cultural recognition.
    2. Scheduled Tribe Status: For 11 Gorkha sub-tribes to ensure constitutional protections and socio-economic inclusion.
    3. Constitutional Recognition: Safeguards for the political identity and rights of the Gorkha people under the Indian Constitution.

    Statehood Demands in India: The Bigger Picture

    India has witnessed over 30 major statehood demands since Independence. While the Constitution empowers Parliament to reorganize states under Article 3, these movements have tested the balance between administrative efficiency, cultural autonomy, and political representation.

    Why Do Statehood Demands Arise?

    • Cultural & Linguistic Identity:
        1. Key reason: Desire for recognition of unique language, ethnicity, or cultural practices.
        2. Examples: Gorkhaland (Nepali-speaking identity), Bodoland (Bodo tribes), Vidarbha (Marathi dialect and identity).
    • Developmental Disparities:
        1. Economic neglect and poor resource distribution often drive demands.
        2. Example: Telangana’s movement was anchored in perceived neglect by Andhra’s political elite.
    • Administrative Efficiency:
        1. Smaller states are believed to ensure better governance and resource management.
        2. Example: Creation of Chhattisgarh and Uttarakhand in 2000.
    • Political Representation & Power-sharing:
        1. Regional elites demand greater political space or autonomy to reflect local aspirations.
    • Ethnic Security and Integration:
      1. Fear of cultural assimilation or discrimination by dominant groups drives ethnic-based mobilisation (e.g., Bodoland, Kukiland, Karbi Anglong).
    Year Movement Outcome
    1953 Andhra State (Potti Sriramulu movement) First linguistic state formed
    1960 Maharashtra & Gujarat Bombay Reorganisation Act
    1972 Meghalaya, Manipur, Tripura New northeastern states created
    1987 Mizoram & Arunachal Pradesh Granted full statehood
    2000 Chhattisgarh, Jharkhand, Uttarakhand Created for administrative and developmental reasons
    2014 Telangana Result of sustained agitation
    Ongoing Gorkhaland, Bodoland, Vidarbha, Bundelkhand Unresolved, periodic agitations

    Constitutional Mechanism for Creating New States

    Article 3 empowers Parliament to form new states by altering the boundaries or names of existing ones.

    Procedure:

    1. Process: Bill introduced in Parliament → Referred to State Legislature for views (not consent) Passed by simple majority.
    2. Centre’s Discretion: State opinion is advisory, not binding — ensuring national flexibility but sometimes triggering discontent.
    3. Examples:
      • Telangana was created despite Andhra Pradesh’s legislature opposing it.
      • Jharkhand was carved out of Bihar through a parliamentary process.

    Challenges and Implications of Statehood Movements

    1. Political Fragmentation: Multiplying small states may weaken national coherence and increase Centre-State friction.
    2. Administrative Burden: Creating new bureaucratic structures increases fiscal costs.
    3. Resource Distribution Issues: Conflicts over rivers, minerals, and forest resources (e.g., Telangana-Andhra).
    4. Ethnic Competition: One community’s recognition can fuel new demands from others.
    5. Positive Outcomes: Improved local governance, targeted development, and better representation when well-implemented (e.g., Chhattisgarh’s success in rural health and PDS).

    Lessons from Gorkhaland and Other Movements

    1. Need for Institutional Dialogue: Interlocutors and commissions reduce the risk of violent agitation by creating formal channels for negotiation.
    2. Multi-stakeholder Approach: Engagement should include Centre, State, local bodies, and civil society, not just political parties.
    3. Development-Based Solutions: Autonomy and identity must align with socio-economic development for long-term peace.
    4. Model for Others: If successful, the Gorkhaland dialogue could serve as a precedent for resolving other autonomy demands peacefully.

    Conclusion

    The Gorkhaland issue is not merely a regional agitation; it is part of India’s broader story of balancing unity with diversity, integration with autonomy, and identity with development. The Centre’s interlocutor initiative provides a constitutional, consultative path forward, one that aligns with India’s ethos of resolving internal aspirations democratically.

    As India continues to evolve, the challenge will be to ensure that new demands for statehood or autonomy are addressed through dialogue, data, and development, not through division or delay.

    PYQ Relevance

    [UPSC 2013] Creation of a large number of smaller States would bring in effective governance at the State level. Discuss.

    Linkage: This PYQ links directly with Gorkhaland and other statehood demands, testing ideas of better governance and federal balance. The article helps students with examples, chronology, and constitutional context to write precise GS II answers.

  • Rising carbon dioxide levels

    Introduction

    The atmospheric concentration of carbon dioxide (CO₂), the most significant greenhouse gas responsible for climate change, has increased by a record amount between 2023 and 2024, according to the World Meteorological Organization (WMO). The global average CO₂ concentration reached 423.9 parts per million (ppm) in 2024, 3.5 ppm higher than in 2023, representing the steepest one-year increase since records began.

    This unprecedented rise coincides with 2024 being the hottest year on record, with average global temperatures 1.55°C higher than pre-industrial levels, breaching the 1.5°C limit scientists consider critical to prevent irreversible impacts.

    Why This Is a Big Deal

    This spike is unprecedented in modern climate history. Never before have CO₂ levels risen so sharply in a single year. It not only breaks the trend of relative stability observed over the last decade but also exposes the collapse of the global climate response despite the Paris Agreement. The rate of increase (3.5 ppm) is more than four times the average annual increase recorded between 2011 and 2020.

    What makes this even more concerning is that both human-induced emissions (from fossil fuels, deforestation, and industrial activity) and natural feedback loops (like reduced ocean absorption and forest diebacks) are now amplifying each other, creating a self-perpetuating climate crisis.

    What Is Driving the Surge in CO₂ Concentrations?

    1. Record-breaking increase: Global average CO₂ near Earth’s surface reached 423.9 ppm in 2024, marking a 3.5 ppm rise, the largest annual jump ever.
    2. Failure of climate frameworks: Despite international efforts under the Paris Agreement, emissions continue to climb, reflecting inadequate implementation and weak compliance.
    3. Global warming feedback: Higher temperatures reduce oceans’ capacity to absorb CO₂ and increase droughts and wildfires, releasing more carbon into the atmosphere.
    4. Burning of fossil fuels: Continued dependence on coal, oil, and gas remains the primary driver, responsible for more than 90% of anthropogenic CO₂ emissions.

    How Are Natural Sinks Losing Their Absorptive Power?

    1. Reduced ocean absorption: Warmer oceans have absorbed less CO₂ in 2024 due to decreased solubility of gases in higher temperatures.
    2. Forest fires and droughts: A spike in wildfires and prolonged dry spells reduced the CO₂-absorbing capacity of trees and grasslands.
    3. Feedback loops: The decline of natural sinks worsens CO₂ imbalance, which in turn leads to even greater heat trapping and further degradation of these ecosystems.

    How Do Other Greenhouse Gases (GHGs) Compare?

    1. Methane (CH₄): Second-most potent GHG, rose by 8 parts per billion in 2024 to reach 1,924 ppb, slightly below last decade’s average but still historically high.
    2. Nitrous oxide (N₂O): Increased by 1 ppb to 338 ppb in 2024, contributing to long-term warming effects due to its 270-year lifespan.
    3. Relative potency: While CH₄ and N₂O are more heat-trapping per molecule, CO₂ dominates because of its sheer volume and persistence in the atmosphere for thousands of years.

    Why Is This Rise Unprecedented?

    1. Historical contrast: From the 1960s to 2010, CO₂ levels rose by 0.8 ppm per year; between 2011–2020, it increased by 2.4 ppm annually, far below the 2023–24 jump of 3.5 ppm.
    2. Crossing planetary limits: This rise pushed Earth past the 1.5°C warming threshold, previously considered a safe boundary.
    3. Interlinked causes: WMO attributes this to a mix of human emissions and natural CO₂ variability, indicating global climate systems are destabilizing.

    Challenges for Global Climate Action

    1. WMO warning: The new data underscores the difficulty in curbing GHG accumulation in the atmosphere.
    2. Failure of control mechanisms: Despite decades of negotiations, anthropogenic activities continue unchecked.
    3. Feedback intensification: Natural processes, once climate stabilizers, are now acting as amplifiers of warming.
    4. Paris Agreement setback: The emission reduction targets for 2030 are unlikely to be met, while global temperatures already breached the 1.5°C mark.

    Conclusion

    The record-breaking surge in CO₂ levels between 2023 and 2024 is not just a statistical anomaly, it’s a planetary red alert. The intertwining of human actions and natural feedback loops signifies that climate change has entered a runaway phase unless drastic global mitigation is undertaken. The failure to meet emission targets and the collapse of natural carbon sinks highlight that the climate crisis is no longer a distant threat, it’s a present emergency demanding immediate collective action.

    PYQ Relevance

    [UPSC 2022] Discuss global warming and mention its effects on the global climate. Explain the control measures to bring down the level of greenhouse gases which cause global warming, in the light of the Kyoto Protocol, 1997.

    Linkage: The article is important as it highlights the sharpest-ever rise in global CO₂ levels, signalling a critical climate tipping point and the failure of existing global frameworks like the Kyoto and Paris Agreements to curb emissions. It links directly with the question by showing how unchecked greenhouse gases are intensifying global warming and threatening climate stability.

  • Tejas Light Combat Aircraft (LCA)-Mk1A

    Why in the News?

    Defence Minister inaugurated the third production line of Tejas Light Combat Aircraft (LCA) Mk1A at Hindustan Aeronautics Limited (HAL), Nashik.

    About Tejas Light Combat Aircraft (LCA)-Mk1A:

    • Overview: Single-engine, 4.5-generation, supersonic multirole fighter aircraft developed indigenously under India’s LCA programme.
    • Developers: Designed by the Aeronautical Development Agency (ADA) of DRDO and produced by Hindustan Aeronautics Limited (HAL).
    • Purpose: Conceived in the late 1980s to replace the ageing MiG-21 and Su-7 fleets of the Indian Air Force.
    • Operational Induction: Entered production for the Indian Air Force (IAF) in 2024 after extensive flight trials and certification.
    • Roles: Designed for air superiority, ground attack, close air support, and interception missions.
    • Manufacturing Hubs: Produced at HAL Bengaluru and HAL Nashik, with parallel assembly lines to meet IAF delivery targets.

    Key Features of Tejas LCA-Mk1A:

    • Design: Tailless compound delta-wing configuration ensuring high agility, aerodynamic efficiency, and reduced radar cross-section.
    • Engine: Powered by General Electric F404-GE-IN20 turbofan, enabling speeds up to Mach 1.8.
    • Avionics: Equipped with Active Electronically Scanned Array (AESA) radar, Electronic Warfare Suite, and Onboard Oxygen Generation System (OBOGS).
    • Flight Control: Features Digital Fly-by-Wire System for enhanced stability and pilot control.
    • Weapons Integration: Can carry air-to-air, air-to-ground, and precision-guided munitions, including Beyond Visual Range (BVR) missiles.
    • Cockpit: Modern glass cockpit with Helmet Mounted Display (HMD) and Hands-On-Throttle-And-Stick (HOTAS) controls.
    • Payload & Range: Payload capacity over 4,000 kg across eight external hardpoints; combat radius around 500 km, ferry range up to 1,700 km.
    • Network Capability: Integrated with secure data link systems for real-time communication and situational awareness.
    • Maintenance: Modular design allowing easy servicing, high turnaround rate, and improved mission readiness for sustained operations.
    [UPSC 2024] Consider the following aircraft:
    1. Rafael 2. MiG-29 3. Tejas MK-1
    How many of the above are considered fifth-generation fighter aircraft?
    Options: (a) Only one (b) Only two (c) All three (d) None*

     

  • RBI’s Gold Reserve exceeds $100 billion

    Why in the News?

    The Reserve Bank of India (RBI) reported that India’s gold reserves surpassed $100 billion for the first time in history, reaching $102.365 billion in the week ending October 10, 2025.

    India’s Gold Reserves and Composition (2025):

    • Total Holdings: As of March 31, 2025, the Reserve Bank of India (RBI) held approximately 879.58 metric tonnes of gold.
    • Valuation Milestone: In October 2025, the value of India’s gold reserves crossed USD 100 billion, reaching about USD 102.36 billion, the highest in history.
    • Forex Share: Gold’s share in India’s total foreign exchange reserves rose to 14.7 %, the highest since 1996–97, driven by valuation gains and steady accumulation.
    • Yearly Rise: Early in 2025, gold comprised 12.5 % of reserves, indicating a sharp increase through the year amid global market volatility.
    • Repatriation Move: During FY 2024–25, the RBI repatriated 100.32 tonnes of gold from overseas vaults to India, expanding domestic holdings.

    Distribution of Gold Holdings (March 2025):

    • Domestic Holdings: About 200 metric tonnes held within India.
    • Overseas Holdings: Around 367 metric tonnes stored abroad.
    • Deposits with Foreign Institutions: Approximately 19 metric tonnes.
    • Trend Evolution: Gold share in reserves rose from 5.9 % (2021) to 11.7 % (2025) due to strategic diversification and valuation gains.

    What are Gold Reserves?

    • A gold reserve is the gold held by a country’s central bank, acting as a backup for financial promises and a store of value.
    • India, like other nations, stores some of its gold reserves in foreign vaults to spread out risk and facilitate international trading.
    • India’s Gold Reserves:
      • As of the end of March 2024, the RBI held 822.10 tonnes of gold, with 408.31 tonnes stored domestically.
      • The share of gold in the total forex of India is around 7-8% as of 2023.

    Where does the RBI store its gold?

    • India’s gold reserves are primarily stored in the Bank of England, which is known for its stringent security protocols.
    • The RBI also stores a portion of its gold reserves at the:
      1. Bank for International Settlements (BIS) in Basel, Switzerland, and the
      2. Federal Reserve Bank of New York in the United States.
    During India’s foreign exchange crisis in 1990-91, the country pledged some of its gold reserves to the Bank of England to secure a $405 million loan, according to reports.

    Even though the loan was paid back by November 1991, India decided to keep the gold in the UK for convenience.

    Why does the RBI store its gold in foreign banks?

    • Convenience: Storing gold overseas makes it easier for India to trade, engage in swaps and earn returns.
    • Averting Risks: There are risks involved, especially during times of geopolitical tensions and war.
      • The recent freezing of Russian assets by Western nations has raised worries about the safety of assets kept abroad and the RBI decision to shift a portion of the gold reserve to India could be prompted by these concerns.
    • Stable Prices: Unlike fiat currencies, which can be subject to inflation or devaluation due to various economic factors, the value of gold tends to be relatively stable over time, which makes it an attractive asset for central banks to hold as a reserve.

    Benefits Offered by Gold Reserves

    • Control domestic gold prices: With its big stash of gold, the RBI can help control local gold prices by using some of it in India. Last financial year, the RBI added about 27.47 tonnes of gold to the total reserve, bringing it to 794.63 tonnes.
    • Security buffer: The increased gold reserve works as a hedge against any financial crisis and to take measures to control inflation as well as currency devaluation.
    [UPSC 2015] The problem of international liquidity is related to the non-availability of:

    (a) Goods and services

    (b) Gold and silver

    (c) Dollars and other hard currencies *

    (d) Exportable surplus

     

  • Taftan Volcano, Iran 

    Why in the News?

    New satellite data in Geophysical Research Letters (October 2025) shows Iran’s Taftan volcano, dormant for 710,000 years, is reactivating.

    Taftan Volcano, Iran 

    About Taftan Volcano:

    • Location: Situated in southeastern Iran, about 56 km from the Pakistan border, within the Makran continental volcanic arc.
    • Elevation: Rises to 3,940 metres (12,927 feet), Iran’s only active volcano in the Makran arc.
    • Tectonic Origin: Formed by subduction of the Arabian oceanic plate beneath the Eurasian continental plate.
    • Volcanic Type & Composition: A stratovolcano composed mainly of andesitic and dacitic lava, with pyroclastic flows and volcanic breccias.
    • Structure: Features two summits, Narkuh and Matherkuh, and extensive ignimbrite and lava fans stretching over 30 km.
    • Hydrothermal Activity: Hosts sulfur-emitting fumaroles, visible from up to 100 km, sustained by an active hydrothermal system.
    • Eruptive History: Major activity phases around 8 Ma, 6 Ma, and 0.7 Ma; last lava flow dated to about 6,950 years ago.
    • Recent Observations: 2023–24 satellite data detected 9 cm ground uplift, indicating subsurface pressure buildup and reclassification from extinct to dormant.

    Scientific Interpretation and Outlook:

    • Magma Dynamics: Uplift linked to gas accumulation or shallow magma intrusion at 490–630 m depth, possibly fed by deeper chambers (~3.5 km).
    • Current Status: No imminent eruption expected; likely pressure release via degassing or minor eruptions.
    • Monitoring Gap: Lack of ground-based GPS or seismic sensors; reliance on satellite InSAR data for deformation tracking.
    • Scientific Recommendations: Call for establishing a volcano observatory in southeastern Iran for real-time monitoring and gas analysis.
    • Regional Significance: Highlights Makran arc tectonic activity and underscores the need for international geophysical collaboration.
    • Research Importance: Taftan’s reawakening demonstrates the role of remote sensing in detecting hidden volcanic unrest and stresses continuous monitoring to assess eruption potential and regional hazard mitigation.
    [UPSC 2024] Consider the following:
    1. Pyroclastic debris 2. Ash and dust 3. Nitrogen compounds 4. Sulphur compoundsHow many of the above are products of volcanic eruptions?Options: (a) Only one (b) Only two (c) Only three (d) only four*

     

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