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Subject: Environment

  • International Big Cat Alliance (IBCA) Summit 

    Why in the News

    India will host the first International Big Cat Alliance (IBCA) Summit in June 2026, with participation from around 95 countries. The summit is expected to adopt the Delhi Declaration on global big cat conservation.

    About International Big Cat Alliance (IBCA)

    • A global alliance for big cat conservation
    • Launched by Narendra Modi in 2023
    • Conceived and led by India

    Objective

    • Promote:
      • Conservation of big cats
      • Habitat protection
      • Research and innovation
      • International cooperation

    Big Cats Covered under IBCA

    • Lion, Tiger, Leopard, Snow Leopard, Cheetah, Jaguar, and Puma. 
    [2020] Consider the following statements: 
    1 Asiatic lion is naturally found in India only. 
    2 Double-humped camel is naturally found in India only. 
    3 One-horned rhinoceros is naturally found in India only. 
    Which of the statements given above is/are correct? 
    (a) 1 only (b) 2 only (c) 1 and 3 only (d) 1, 2 and 3
  • Industrial heat pumps and the case for cleaning industrial heat

    Why in the News?

    Industrial heat remains one of the least discussed yet most carbon-intensive segments of India’s energy economy. Nearly half of India’s final energy consumption comes from industry, and a large share of it is still dependent on fossil-fuel-based boilers and steam systems. There is now a  shift in the climate debate away from only “future technologies” such as green hydrogen and carbon capture towards a commercially available solution already capable of reducing emissions, improving air quality, cutting energy costs, and enhancing worker safety.

    Why is industrial heat emerging as a major policy and climate concern?

    1. Energy Consumption: Industry accounts for nearly half of India’s final energy consumption in 2025. A major share remains dependent on fossil fuels.
    2. Emission Intensity: Industrial process steam alone emits around 182 million metric tonnes of CO₂ annually in India.
    3. Air Pollution: Industrial heating systems emit nearly 595 kilotonnes of SO₂, 520 kilotonnes of particulate matter, and 516 kilotonnes of NOx.
    4. MSME Dependence: MSMEs rely heavily on conventional thermal systems such as boilers, thermal fluid heaters, dryers, evaporators, and hot-water systems.
    5. Sectoral Concentration: Emissions are concentrated in textiles, food processing, chemicals, pharmaceuticals, and paper sectors.
    6. Public Health Burden: Fossil-fuel-driven air pollution caused nearly 1.72 million premature deaths in India in 2022. Industrial heat systems are major contributors.
    7. Energy Security Risks: Dependence on imported fossil fuels increases industrial vulnerability to global energy shocks and price volatility.

    How do Industrial Heat Pumps (IHPs) function and why are they considered transformative?

    Industrial Heat Pumps (IHPs) are high-capacity, electrified systems that upgrade low-temperature waste heat from industrial processes, such as wastewater or exhaust gases, into useful, higher-temperature heat (up to 160 degree celsius or more). They are crucial for industrial decarbonization, replacing fossil-fuel boilers to significantly reduce greenhouse gas emissions.

    1. Heat Recovery Mechanism: Heat pumps capture low-grade heat and upgrade it into usable process heat using electricity.
    2. No Direct Combustion: Unlike boilers, heat pumps do not generate heat by burning fuel.
    3. Efficiency Advantage: Industrial heat pumps typically achieve a Coefficient of Performance (COP) of 3-5, producing 3-5 units of heat for every unit of electricity consumed.
    4. Electricity Optimization: Heat pumps require lower electricity input compared to direct electric resistance heating.
    5. Waste Heat Utilisation: Systems recover waste heat from effluents, evaporators, drying streams, and industrial exhausts.
    6. Dual Utility: Heat pumps simultaneously provide heating and cooling/dehumidification in industrial operations.
    7. Temperature Suitability: Technology is particularly viable for low-to-medium temperature industrial applications.

    What are conventional industrial thermal systems?

    Conventional industrial thermal systems are established, widely used technologies designed to generate, transfer, and manage heat for manufacturing processes. These systems primarily rely on fossil fuels, electricity, or steam to achieve high temperatures required for applications like melting, drying, curing, and distilling. The most common conventional systems include:

    1. Steam Heating Systems (Boilers): Boilers are the most mature industrial heating method. They use fuel combustion (natural gas, oil, coal) or electricity to heat water, creating steam that is transported through pipes to heat exchangers.
    2. Fuel Combustion Heating Systems: These systems burn fuel (natural gas, oil) directly or indirectly to generate high temperatures.
      1. Direct-Fired: Burners heat the product directly.
      2. Indirect-Fired: Hot combustion gases pass through heat exchangers to heat air or products without direct contact.
    3. Thermal-Fluid (Hot Oil) Systems: These systems circulate specialized oil or synthetic heat transfer fluids in a closed loop, rather than water. They can reach temperatures up to 350 degree celsius while operating at low pressure.
    4. Electric Heating Systems: These systems convert electrical energy into heat using resistance elements (coils, rods) or electromagnetic fields

    Why are conventional industrial thermal systems considered inefficient?

    1. Boiler-Centric Design: Conventional systems prioritize peak heat requirements rather than optimized heat demand.
    2. Steam Losses: High-pressure steam generation results in energy dissipation when diverted to lower-temperature applications.
    3. Oversized Infrastructure: Many boilers are oversized, manually operated, and function below optimal efficiency.
    4. Combustion Dependence: Industrial heating remains dependent on coal, biomass, furnace oil, diesel, and gas combustion.
    5. Embedded Energy Waste: Large quantities of energy are lost in maintaining vessel temperatures and heating surfaces rather than directly heating products.
    6. Fragmented MSME Systems: Small-scale industries lack integrated thermal optimization systems.

    How can Industrial Heat Pumps improve industrial competitiveness and MSME efficiency?

    1. Energy Savings: Heat pumps can reduce overall industrial energy use by 40-60% in suitable applications.
    2. Modular Deployment: Systems can be deployed selectively without replacing the entire industrial heating infrastructure.
    3. Brownfield Compatibility: Heat pumps integrate into existing MSME clusters without requiring complete industrial redesign.
    4. Cost Reduction: Electrified heating lowers operational fuel expenditure over time.
    5. Operational Stability: Combined heating and cooling improves process stability in textile printing and food processing.
    6. Scalability: MSMEs can adopt modular retrofits rather than capital-intensive boiler replacement.
    7. Fuel Diversification: Electrification reduces exposure to volatile coal and fuel prices.

    What role can Industrial Heat Pumps play in India’s decarbonisation strategy?

    1. Emission Reduction: Heat pumps reduce direct industrial combustion emissions.
    2. Electrification Pathway: They support transition from fossil-fuel heating to renewable-electricity-based industrial systems.
    3. Climate Commitments: Industrial heat electrification supports India’s net-zero and Nationally Determined Contribution (NDC) targets.
    4. Green Manufacturing: Cleaner production enhances export competitiveness amid emerging carbon border adjustment mechanisms.
    5. Renewable Integration: Renewable electricity improves the carbon efficiency of heat pump systems.
    6. Distributed Decarbonisation: Heat pumps provide decentralized emission reduction opportunities across MSME clusters.

    How does industrial heat electrification strengthen public health and worker safety?

    1. Heat Exposure Reduction: Heat pumps reduce excessive workplace thermal stress.
    2. Occupational Safety: Lower ambient industrial temperatures reduce risks of heat exhaustion, cardiovascular strain, kidney disease, and reduced cognitive performance.
    3. Air Quality Improvement: Electrified systems reduce harmful particulate and gaseous emissions.
    4. Worker Productivity: Improved thermal comfort enhances workplace efficiency.
    5. Urban Pollution Reduction: Cleaner industrial clusters contribute to improved regional air quality.
    6. Integrated Cooling: Simultaneous cooling and dehumidification improve factory-floor conditions.

    What are the major barriers to large-scale deployment of Industrial Heat Pumps in India?

    1. High Initial Costs: Capital expenditure remains a major challenge for MSMEs.
    2. Electricity Reliability: Heat pumps require stable and affordable electricity supply.
    3. Technology Awareness: Industrial operators often lack technical awareness and performance confidence.
    4. Legacy Infrastructure: Existing industrial systems are designed around combustion-based thermal processes.
    5. Financing Constraints: MSMEs face limited access to green credit and concessional finance.
    6. Grid Emissions: Benefits reduce if electricity generation remains coal-dominated.

    What policy measures can accelerate adoption of Industrial Heat Pumps?

    1. Green Finance: Low-interest loans and blended finance mechanisms can reduce adoption barriers.
    2. MSME Modernisation: Cluster-based retrofitting programs can improve scale economies.
    3. Carbon Pricing: Emission pricing mechanisms can improve competitiveness of cleaner technologies.
    4. Energy Audits: Mandatory industrial heat mapping can identify waste heat recovery opportunities.
    5. Renewable Integration: Dedicated renewable power supply for industrial clusters can enhance decarbonisation benefits.
    6. Standards and Certification: Performance benchmarks can improve market confidence.

    Conclusion

    Industrial heat represents one of the most significant yet under-addressed sources of emissions in India’s economy. Industrial Heat Pumps provide a technologically mature and energy-efficient pathway for reducing fossil fuel dependence in low-to-medium temperature industrial processes. Their significance extends beyond climate mitigation to include air quality improvement, MSME modernization, occupational safety, and industrial competitiveness. 

    PYQ Relevance

    [UPSC 2022] Do you think India will meet 50 percent of its energy needs from renewable energy by 2030? Justify your answer. How will the shift of subsidies from fossil fuels to renewables help achieve the above objective? Explain

    Linkage: The Industrial Heat Pump (IHP) debate directly links industrial decarbonisation with renewable-energy-based electrification of manufacturing processes. This topic is particularly important for Prelims as well where key aspects of IHPs can be asked or their comparison with conventional thermal systems. The topic integrates GS-3 themes of energy transition, industrial growth, climate mitigation, energy efficiency, MSME modernization, and sustainable infrastructure.

  • “‘Ecocide’: How international law falls short in addressing the environmental toll of war “

    Why in the News?

    The debate on recognising “ecocide” as an international crime has intensified amid allegations that Israel’s military operations in Gaza and southern Lebanon caused severe environmental destruction. This includes contamination of water bodies, destruction of farmland, and long-term ecological degradation. The issue has acquired global significance because existing international humanitarian law (IHL) largely treats environmental damage as secondary to human suffering during war.

    What is “ecocide” and how did the concept evolve?

    1. Definition: Ecocide refers to severe or widespread destruction of ecosystems causing long-term environmental harm and affecting human survival.
    2. Historical origin: The term gained prominence during the Vietnam War after the United States used Agent Orange and chemical defoliants that devastated forests and ecosystems.
    3. Stockholm Conference (1972): The issue received international attention during the United Nations Conference on the Human Environment held in Stockholm.
    4. Vietnam precedent: Vietnam became the first country in 1990 to codify ecocide within domestic law.
    5. National legal developments: Countries such as Russia, Ukraine, Belarus, Kazakhstan, Kyrgyzstan, Tajikistan, Georgia, Armenia, and several others incorporated ecocide-related provisions into domestic legislation.
    6. Emerging legal philosophy: The concept reflects a transition from anthropocentric law focused solely on humans to ecocentric approaches recognising intrinsic environmental value.

    Why has “ecocide” emerged as a major issue in international law?

    1. Conflict-linked ecological destruction: Military operations in Gaza and southern Lebanon reportedly caused destruction of agricultural land, contamination of water systems, and large-scale ecological degradation.
    2. Global legal debate: International lawyers and environmental groups renewed demands for including ecocide under the Rome Statute governing the International Criminal Court (ICC).
    3. Shift in legal thinking: Traditional international law protected the environment only indirectly through civilian protection provisions. Current advocacy seeks recognition of environmental harm as an independent international crime.
    4. Growing scale of wartime damage: Modern warfare increasingly affects ecosystems through chemical contamination, destruction of forests, targeting of infrastructure, and long-term pollution.
    5. Climate-security linkage: Environmental destruction during conflict aggravates food insecurity, displacement, health crises, and climate vulnerability.

    How does ecocide differ from existing international crimes?

    1. Anthropocentric framework: Existing international criminal law focuses primarily on harm caused to humans rather than harm caused directly to ecosystems.
    2. Rome Statute limitation: The Rome Statute criminalises environmental damage only when linked to war crimes and when damage is “widespread, long-term and severe.”
    3. High evidentiary threshold: Current provisions require proving excessive environmental damage relative to anticipated military advantage.
    4. Indirect protection: Environmental harm is prosecuted mainly through civilian suffering, public health impacts, or destruction of civilian objects.
    5. Ecocide framework: Proposed ecocide laws seek independent criminal liability for severe environmental destruction irrespective of direct human casualties.
    6. Expanded accountability: The proposal aims to hold political leaders, military commanders, corporations, and non-state actors accountable for large-scale ecological harm.

    What protections does international humanitarian law currently provide?

    1. Geneva Conventions: International Humanitarian Law (IHL) prohibits warfare methods causing “widespread, long-term and severe” damage to the natural environment.
    2. Additional Protocol I (1977): Article 35 and Article 55 restrict warfare techniques expected to cause extensive environmental destruction.
    3. Environmental Modification Convention (ENMOD), 1976: Prohibits deliberate environmental manipulation techniques such as triggering floods, earthquakes, or weather modification as weapons.
    4. Customary international law: Requires proportionality and distinction principles during armed conflict to minimise environmental damage.
    5. Precautionary obligations: States must avoid unnecessary destruction of civilian infrastructure linked to environmental survival, including water and agricultural systems.
    6. Legal ambiguity: Existing laws lack clear definitions for terms such as “long-term,” “widespread,” and “severe.”

    Why is enforcement of environmental protection during war weak?

    1. Jurisdictional limitations: The International Criminal Court (ICC) can prosecute only member states or cases referred by the United Nations Security Council (UNSC).
    2. Political constraints: Major military powers often resist expansion of international criminal liability.
    3. Proof-related challenges: Establishing direct causation between military action and long-term ecological damage remains difficult.
    4. State sovereignty concerns: Countries fear that ecocide provisions could restrict military operations and economic activities.
    5. Absence of universal recognition: Ecocide is not yet formally recognised as the fifth international crime under the Rome Statute.
    6. Weak accountability mechanisms: International environmental law lacks strong punitive enforcement compared to trade or security regimes.

    What are the major international efforts toward recognising ecocide?

    1. Stop Ecocide movement: International campaigns advocate inclusion of ecocide under the Rome Statute alongside genocide and crimes against humanity.
    2. Independent Expert Panel (2021): Legal experts proposed a draft definition of ecocide as “unlawful or wanton acts committed with knowledge of substantial likelihood of severe environmental damage.”
    3. European developments: The Council of Europe adopted a convention on environmental crime strengthening penalties for severe ecological damage.
    4. European Union initiatives: The European Union revised environmental crime directives to strengthen liability for ecological destruction.
    5. International Union for Conservation of Nature (IUCN): Supported discussions on recognising ecocide as an international crime.
    6. Small island states’ advocacy: Climate-vulnerable nations increasingly support stronger environmental accountability frameworks.

    How does ecocide intersect with climate change and human security?

    1. Food security risks: Conflict-related environmental destruction damages agricultural productivity and food systems.
    2. Water insecurity: Bombing of infrastructure contaminates freshwater resources and sanitation systems.
    3. Public health consequences: Toxic exposure, air pollution, and ecosystem collapse generate long-term health crises.
    4. Forced displacement: Environmental degradation accelerates migration and refugee crises.
    5. Biodiversity loss: Warfare destroys habitats and accelerates species extinction.
    6. Climate vulnerability: Environmental damage weakens ecosystem resilience against climate change impacts.

    What are India’s interests and concerns regarding ecocide law?

    1. Strategic balancing: India supports environmental protection while remaining cautious about expanding international criminal jurisdiction.
    2. Climate justice dimension: Developing countries seek equitable environmental obligations considering historical responsibility.
    3. Military implications: Broad ecocide definitions may affect counter-insurgency and border security operations.
    4. Global South perspective: Concerns exist regarding selective application of international criminal law against weaker states.
    5. Environmental diplomacy: India increasingly participates in climate governance, biodiversity protection, and sustainable development negotiations.

    Conclusion

    The ecocide debate highlights the growing need to treat environmental destruction during war as a serious international crime. Existing international law provides limited protection due to weak enforcement and high legal thresholds. Recognising ecocide can strengthen environmental accountability, climate justice, and global peace frameworks.

    PYQ Relevance

    [UPSC 2020] How does the draft Environment Impact Assessment (EIA) Notification, 2020 differ from the existing EIA Notification, 2006?

    Linkage: The ecocide debate directly relates to environmental accountability, environmental governance, and limits of existing legal frameworks. Both topics examine how law balances development, conflict, sovereignty, and environmental protection.

  • Teesta Water Sharing Dispute 

    Why in the News

    Bangladesh has urged India to reconsider the long pending Teesta water sharing agreement following political changes in West Bengal. Bangladesh also indicated that the issue may be discussed with China during high level talks in Beijing.

    About the Teesta River

    • Origin: Eastern Himalayas near the Pauhunri glacier
    • Flows through: Sikkim, West Bengal, and Bangladesh
    • Tributary of the Brahmaputra River

    Nature of the Dispute

    • Both India and Bangladesh depend on Teesta waters for:
      • Irrigation
      • Agriculture
      • Livelihoods
    • Bangladesh seeks a larger share of dry season flow

    2011 Proposed Agreement

    • India and Bangladesh reached an in principle agreement during PM Manmohan Singh’s visit
    • Agreement could not be finalised due to objections from West Bengal government

    Key Issues Involved

    • Water sharing during lean season
    • Role of States in international river agreements
    • Federal coordination between:
      • Union Government
      • State Government

    China’s Role

    • Bangladesh discussing Teesta River Comprehensive Management and Restoration Project with China
    • Reflects strategic dimension of regional water diplomacy
    [2017] With reference to river Teesta, consider the following statements 
    1 The source of river Teesta is the same as that of Brahmaputra but it flows through Sikkim. 
    2 River Rangeet originates in Sikkim and it is a tributary of river Teesta. 
    3 River Teesta flows into Bay of Bengal on the border of India and Bangladesh. 
    Which of the statements given above is/are correct? 
    a)  1 and 3 only b) 2 only c) 2 and 3 only d) 1, 2 and 3 
  • What does the latest ruling mean for Forest Rights Act?

    Why in the News?

    The Allahabad High Court’s ruling striking down the District Level Committee’s (DLC) rejection of forest rights claims is significant because it reaffirms that the Forest Rights Act (FRA), 2006 overrides inconsistent court orders and administrative actions. This is not a routine judicial review; it exposes a recurring pattern where authorities have issued eviction orders and denied grazing rights despite FRA protections. The ruling is a corrective intervention against institutional non-compliance. 

    What is the whole case?

    This Allahabad High Court ruling, delivered by the Lucknow Bench in April 2026, is a landmark judgment reinforcing the legal supremacy of the Forest Rights Act (FRA), 2006, over previous laws and inconsistent administrative decisions. 

    The case centered on the Tharu community in Uttar Pradesh’s Lakhimpur Kheri district, whose forest rights claims were rejected by the District Level Committee (DLC) in 2021.

    Context of the Case

    1. The Petitioners: 107 members of the ‘Tharu’ community, a designated Scheduled Tribe, filed for individual and community forest rights (including rights to collect minor produce).
    2. The Impugned Order: The DLC in 2021 rejected these claims based on a 2000 interim order from the Supreme Court (issued under the old Forest Conservation Act, 1980), ignoring that the FRA was enacted later in 2006 to rectify historical injustice.
    3. The Ruling: The bench quashed the 2021 rejection order and directed a fresh, fair, and prompt rehearing of the claims. 

    Which rights are recognised under the Forest Rights Act (FRA), 2006?

    1. Individual Forest Rights (IFR): Recognises land rights for cultivation (up to 4 hectares); ensures livelihood security for forest dwellers.
    2. Habitation Rights: Recognises rights over homestead and habitation areas; ensures protection from displacement.
    3. Community Rights (CR): Recognises access to minor forest produce (MFP), grazing grounds, water bodies; ensures economic sustenance.
    4. Ownership of MFP: Grants ownership, collection, use, and disposal rights over non-timber forest produce; ensures income generation (e.g., bamboo, tendu leaves).
    5. Community Forest Resource (CFR) Rights: Empowers Gram Sabha to protect, regenerate, conserve, and manage forests; ensures decentralized forest governance.
    6. Grazing and Pastoral Rights: Recognises traditional grazing routes and seasonal migration; supports pastoral communities.
    7. Habitat Rights (PVTGs): Recognises habitat and territorial rights of Particularly Vulnerable Tribal Groups; ensures cultural and livelihood protection.
    8. Rights over Traditional Knowledge: Protects intellectual property and cultural practices related to biodiversity; prevents exploitation.
    9. Development Rights: Allows diversion of forest land (up to 1 hectare) for basic infrastructure (schools, roads, anganwadi); ensures rural development.
    10. Rights against Eviction: Prohibits eviction until recognition process is complete; ensures due process and tenure security.
    11. Rehabilitation Rights: Recognises rights of displaced forest dwellers; ensures resettlement and compensation.
    12. Governance Rights (Gram Sabha): Recognises Gram Sabha as authority for claims verification and forest management; ensures participatory democracy.

    Why was the Allahabad High Court’s ruling significant for FRA enforcement?

    1. Judicial Supremacy of FRA: Reaffirms that FRA overrides inconsistent laws and prior court orders; ensures statutory protection of forest dwellers.
    2. Invalidation of DLC Decision: Nullifies rejection of Tharu tribal claims; exposes procedural violations in claims adjudication.
    3. Systemic Non-Compliance: Highlights repeated disregard of FRA across states; indicates institutional failure in implementation.
    4. Legal Clarification: Reinforces that rights recognition must precede eviction; prevents arbitrary displacement.
    5. Precedential Value: Establishes enforceable precedent for similar disputes nationwide.

    What legal principles govern eviction under the FRA, 2006?

    1. Recognition Before Eviction: Ensures no eviction until claims are fully adjudicated; protects tenure security.
    2. Due Process Requirement: Mandates transparent verification of claims through Gram Sabha and committees.
    3. Statutory Protection: Recognizes forest rights notwithstanding conflicting laws; strengthens tribal safeguards.
    4. Penal Consequences: Provides punishment for officials violating FRA provisions.
    5. Judicial Reinforcement: Uttarakhand High Court (Jan 2026) ordered halt on eviction till claims resolution.

    How have administrative and judicial actions diluted FRA provisions?

    1. Eviction Orders: Authorities issued eviction notices under forest laws despite pending FRA claims.
    2. Misinterpretation of Law: Courts and officials overlooked FRA’s overriding clause; applied older conservation laws.
    3. Case Evidence: Madras High Court dismissed claims in Asaripallam (2014) citing encroachment, ignoring FRA eligibility.
    4. Repeated Violations: Similar dismissals in Perambalur (2017), Tuticorin (2020), Sivagangai (2021), Theni (2022).
    5. Institutional Bias: Preference for conservation-centric approach over rights-based framework.

    Does the FRA allow grazing rights in forest areas?

    1. Recognition of Grazing Rights: FRA explicitly recognizes traditional grazing rights in forests.
    2. Conflict with Wildlife Laws: Tamil Nadu Forest Act invoked to restrict grazing citing wildlife protection.
    3. Judicial Contradictions: Madras High Court initially banned grazing; later restricted it to protected areas.
    4. Legal Hierarchy Principle: FRA, as a central law, overrides conflicting state provisions.
    5. Recent Clarification: Allahabad HC reaffirmed that grazing rights cannot be arbitrarily denied.

    Has the FRA been effectively superseded in practice?

    1. De Facto Dilution: Administrative actions have overridden FRA despite its legal supremacy.
    2. Contradictory Orders: Eviction and denial of rights continue despite statutory protections.
    3. Weak Enforcement Mechanisms: Lack of accountability for violations undermines implementation.
    4. Gram Sabha Marginalization: Reduced role in decision-making weakens community participation.
    5. Governance Gap: Persistent gap between legal framework and field-level execution.

    Conclusion

    The ruling underscores the tension between conservation governance and rights-based legislation. Effective FRA implementation requires administrative accountability, judicial consistency, and empowerment of Gram Sabhas.

    PYQ Relevance

    [UPSC 2016] Rehabilitation of human settlements is one of the important environmental impacts which always attracts controversy while planning major projects. Discuss the measures suggested for mitigation.

    Linkage: The PYQ directly relates to FRA provisions on rehabilitation, displacement safeguards, and rights over land and habitat. It highlights the rights vs development/conservation conflict, central to FRA implementation.

  • Reservoir Levels in India Decline 

    Why in the News

    The Central Water Commission (CWC) has reported that water storage in major reservoirs has fallen below 40 percent, with several river basins showing declining levels across India.

    Key Findings

    • Total reservoirs monitored: 166
    • Current live storage: ~38.7 percent of capacity
    • Earlier (April 2026): ~44.7 percent
    • Decline observed across multiple regions

    States with Declining Reservoir Levels

    • Assam, Goa, Karnataka, Kerala, Madhya Pradesh, Tamil Nadu, Tripura, and West Bengal
      • Several reservoirs in these states are below 40 percent capacity

    River Basins in Concern

    • Ganga Basin
    • Godavari Basin
    • Narmada Basin
    • Krishna Basin
    • Kaveri Basin
      •  Krishna basin particularly weak (~22 percent)

    Worst Affected Regions

    • Northeast and Eastern India
    • Assam, Tripura, West Bengal show sharp depletion
    • Southern states like Tamil Nadu and Karnataka also under stress

    Important Data

    • Total live storage capacity: 183.565 BCM
    • Current storage: 71.082 BCM
    • About 20 reservoirs linked to hydropower

    Key Concepts

    • Live Storage: Usable water available in reservoirs
    • Normal Storage: Average storage based on last 10 years
    [2022] Consider the following pairs: 
    Reservoirs: States 
    1. Ghataprabha: Telangana 
    2. Ghandhi Sagar: Madhya Pradesh 
    3. Indira Sagar: Andhra Pradesh 
    4. Maithon: Chhattisgarh 
    How many pairs given above ate not correctly matched? 
    [A] Only one pair [B] Only two pair [C] Only three pair [D] All four pair
  • Blue Button (Porpita porpita) 

    Why in the News

    Large numbers of Porpita porpita, commonly called Blue Button, were recently found washed ashore at Girgaon Chowpatty. This phenomenon is often observed before the onset of the monsoon.

    What is Blue Button

    • A marine organism found floating on the sea surface
    • Not a single organism but a colonial species
    • Composed of multiple zooids working together as one unit
    • Often mistaken for jellyfish

    Key Characteristics

    • Small, disc shaped body with tentacles
    • Free floating organism
    • Each zooid performs specific functions: Feeding, Digestion, and Movement

    Comparison with Similar Species

    • Blue Button (Porpita porpita)
      • Harmless to humans
      • Mild or no sting
    • Portuguese Man o’ War
      • Venomous
      • Can cause painful stings

    Why They Appear on Shores

    • Linked to monsoon onset
    • Caused by:
      • Changes in sea temperature
      • Shifts in ocean currents
      • Strong winds pushing them ashore
    [2021] Which of the following have species that can establish symbiotic relationship with other organisms? 
    1. Cnidarians 
    2. Fungi 
    3. Protozoa 
    Select the correct answer using the code given below. 
    [A] 1 and 2 only [B] 2 and 3 only [C] 1 and 3 only [D] 1, 2 and 3
  • India’s First Green Methanol Plant 

    Why in the News

    India is set to establish its first green methanol plant at Kandla using the invasive plant Prosopis juliflora as feedstock. The project aims to produce clean marine fuel and support India’s transition to green shipping.

    About Prosopis juliflora

    • A Mexican-origin invasive species
    • Known locally as:
      • Vilayati Keekar (North India)
      • Gando Baval (Gujarat)
    • Introduced in India:
      • 1920s by British
      • Later in 1961 in Gujarat to check desertification
    • Problem:
      • Replaces native grasses
      • Harms biodiversity in Banni grasslands (Kutch)

    About Green Methanol

    • Methanol produced using renewable biomass instead of fossil fuels
    • Used as marine fuel replacing bunker oil
    • Helps reduce emissions significantly

    Key Features of the Project

    • Location: Deendayal Port Authority
    • Production capacity: 5 tonnes per day
    • Developed by: Thermax and Ankur Scientific
    • Feedstock:
      • Prosopis juliflora
      • Other biomass like bagasse and cotton stalk
    [2018] Why is a plant called Prosopis juliflora often mentioned in news? 
    (a) Its extract is widely used in cosmetics. 
    (b) It tends to reduce the biodiversity in the area in which it grows. 
    (c) Its extract is used in the synthesis of pesticides. 
    (d) None of the above.
  • Barbary Macaque

    Why in the News

    Scientists studying the Barbary Macaque population in Gibraltar have observed geophagy (soil eating) behavior. This is believed to help them counter the harmful effects of tourist provided junk food.

    About Barbary Macaque

    • One of the 25 species of macaques worldwide
    • The only macaque species found outside Asia
    • The only non human primate in Europe and North Africa

    Distribution

    • Native range:
      • Atlas Mountains in Algeria and Morocco
    • Introduced population: Gibraltar
    • IUCN Red List: Endangered
    [2013] In which of the following states is lion-tailed macaque found in its natural habitat? 
    1 Tamil Nadu
    2 Kerala 
    3 Karnataka 
    4 Andhra Pradesh 
    Select the correct answer using the codes given below: 
    (a) 1, 2 and 3 only (b) 2 only (c) 1, 3 and 4 only (d) 1, 2, 3 and 4
  • Light Pollution Threatens the World’s Clearest Skies

    Why in the News

    Rising Light Pollution and proposed energy projects have raised concerns about the degradation of the pristine night skies in the Atacama Desert, one of the world’s most important hubs for astronomical research.

    What is Light Pollution

    • Light pollution refers to excessive or misdirected artificial light that brightens the night sky and interferes with astronomical observations and ecosystems.

    Key Facts

    • The Atacama Desert is located in Chile
    • Known as the driest place on Earth
    • Receives over 300 clear nights per year
    • High altitude often exceeding 3000 metres
    • Covers around 105000 sq km

    Why is Atacama ideal for Astronomy?

    • Extremely dry climate reduces atmospheric disturbance
    • High altitude ensures clearer observation
    • Minimal light pollution due to isolation
    • Hosts some of the world’s largest ground based telescopes

    Major Astronomical Facilities

    • European Southern Observatory operates key observatories
    • Paranal Observatory is a major site
    • Extremely Large Telescope
      • Cost about 1.5 billion dollars
      • Expected completion by 2030
      • Features 798 mirrors
      • Around 20 times more powerful than current telescopes
    • Compared with Hubble Space Telescope
      • Around 15 times sharper resolution
    [2017] What is the purpose of ‘evolved Laser Interferometer Space Antenna (eLISA)’ project? 
    (a) To detect neutrinos 
    (b) To detect gravitational waves 
    (c) To detect the effectiveness of missile defence system 
    (d) To study the effect of solar flares on our communication systems