UPSC Mains GS-III Environment PYQ Analysis

Legacy IAS – UPSC Mains GS-III Environment PYQ Analysis
Legacy IAS

Topic-Wise UPSC Mains PYQ Analysis

GS Paper III — Environment
Complete Question Bank with Answer Frameworks (2010–2023)

Total Questions53
Years Covered2010–2023
Topics8 Sub-Topics
PaperGS Paper III
Prepared for Legacy IAS – UPSC Mains (GS-III Environment)

Topic-Wise Navigation

1

Climate Change

6 Questions
202315 MarksAnalyse Impact
The Intergovernmental Panel on Climate Change (IPCC) has predicted a global sea level rise of about one metre by AD 2100. What would be its impact in India and the other countries in the Indian Ocean region?

Question Snapshot

Core Demand: Impact of sea-level rise on India & Indian Ocean countries
Directive: Analyse — cause-effect & multi-dimensional analysis
Syllabus: Climate Change; Conservation
References: IPCC AR6, Paris Agreement, NAPCC
📌 Introduction

Open with IPCC AR6 prediction of ~1m sea-level rise by 2100. India’s 7,500+ km coastline with 170+ million people in low-lying areas makes it among the most vulnerable.

📗 Body – Key Dimensions
  • Impact on India:
    • Submergence — Mumbai, Kolkata, Chennai, Kochi; Sundarbans erosion
    • Displacement of coastal communities, climate refugees
    • Saline intrusion in groundwater, agricultural productivity loss
    • Infrastructure damage — ports, power plants, railways
    • Ecological — mangrove destruction, coral bleaching (Lakshadweep, A&N)
  • Indian Ocean Region:
    • Maldives, Seychelles face existential threat (SIDS)
    • Bangladesh — massive displacement potential
    • Geopolitical — migration, resource conflicts, maritime disputes
  • Governance:
    • NAPCC missions, CRZ notifications
    • Regional cooperation — IORA, SAARC initiatives
🏁 Conclusion

Urgency of climate adaptation + mitigation. India’s NDCs, Loss & Damage Fund (COP27), mangrove restoration, early warning systems. SDG 13 & 14.

💡 Value Additions

Case Study: Sundarbans — Ghoramara island submerged. Data: ~40 million Indians at risk by 2050 (World Bank).

202210 MarksExplain / Discuss
Explain the mechanism and occurrence of cloudburst in the context of the Indian subcontinent. Discuss two recent examples.

Question Snapshot

Core Demand: Mechanism of cloudbursts + Indian examples
Directive: Explain + Discuss with examples
Syllabus: Climate Change; Extreme Weather
References: IMD data, NDMA guidelines
📌 Introduction

Cloudburst — sudden intense rainfall (≥100 mm/hr in ~30 sq km). Climate change increasing frequency in Himalayan region.

📗 Body – Key Dimensions
  • Mechanism: Warm moist air rises rapidly along steep terrain → cumulonimbus clouds → orographic barriers block movement → sudden condensation & downpour.
  • India’s Vulnerability: Himalayan topography, Western Ghats, monsoon dynamics, urbanization.
  • Recent Examples: Uttarakhand 2021 (Chamoli, Nainital); Amarnath 2022 (flash floods, casualties).
  • Impacts: Flash floods, landslides, loss of life & property, infrastructure damage.
🏁 Conclusion

Need Doppler radar expansion, early warning systems, climate-resilient hill infrastructure. SDG 11.

202215 MarksDiscuss / Explain
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.

Question Snapshot

Core Demand: Global warming effects + GHG control + Kyoto Protocol
Directive: Discuss effects & Explain measures
Syllabus: Climate Change; Conventions
References: Kyoto Protocol, UNFCCC, Paris Agreement
📌 Introduction

Global warming — rise in Earth’s average temperature due to GHG accumulation. ~1.1°C rise since pre-industrial era. Kyoto Protocol (1997) was first binding treaty.

📗 Body – Key Dimensions
  • Effects: Rising sea levels, glacial retreat, extreme weather, ocean acidification, biodiversity loss, desertification, food security threats.
  • Kyoto Mechanisms:
    • CBDR-RC principle
    • CDM — developed nations invest in developing country projects
    • Joint Implementation between Annex I nations
    • Emissions Trading — carbon market
  • Limitations: US non-ratification, limited coverage → led to Paris Agreement (2015) with NDCs.
  • India’s Steps: NAPCC (8 missions), INDC targets, ISA, LiFE initiative.
🏁 Conclusion

Kyoto was a landmark first step; Paris Agreement now central. India’s 50% non-fossil capacity by 2030 & net-zero by 2070. SDG 13.

201715 MarksDiscuss
‘Climate Change’ is a global problem. How India will be affected by climate change? How Himalayan and coastal states of India will be affected by climate change?

Question Snapshot

Core Demand: CC impact on India — Himalayan & coastal states
Directive: Discuss — region-specific analysis
Syllabus: Climate Change; Conservation
References: IPCC, NAPCC, State Action Plans
📌 Introduction

Climate change is global but impacts are localized. India’s diverse geography — Himalayan glaciers to vast coastline — faces multi-dimensional vulnerability.

📗 Body – Key Dimensions
  • General Impact: Rising temps, erratic monsoons, extreme weather, agricultural decline, water stress.
  • Himalayan States: Glacial retreat (Gangotri, Siachen), GLOF risk, landslides, permafrost melting, river flow disruption, livelihood loss.
  • Coastal States: Sea level rise, cyclone intensification (Amphan, Tauktae), saltwater intrusion, Sundarbans erosion, coral bleaching, urban flooding.
  • Socio-economic: Climate migration, vector-borne diseases, food insecurity.
🏁 Conclusion

Region-specific adaptation needed. NAPCC missions, CRZ regulations, climate-resilient agriculture, early warning systems. SDG 13, 15.

201112 MarksComment
The impact of climate change on water resources in India.

Question Snapshot

Core Demand: Climate change-water resources nexus
Directive: Comment — balanced analysis with examples
Syllabus: Climate Change; Water Resources
References: CWC data, NAPCC Water Mission
📌 Introduction

India receives 80% rainfall in 4 months. Climate change disrupts this fragile hydrological cycle, threatening water security for 1.4 billion.

📗 Body – Key Dimensions
  • Glacial Melt: Himalayan glaciers receding → short-term flow increase, long-term scarcity for Ganga, Indus, Brahmaputra.
  • Monsoon Variability: Erratic rainfall — droughts in some regions, floods in others. Fewer rainy days but higher intensity.
  • Groundwater: Reduced recharge, over-extraction worsened by climate stress.
  • Quality: Saline intrusion in coastal aquifers, flood-related contamination.
🏁 Conclusion

Integrated water resource management, rainwater harvesting, micro-irrigation, NAPCC Water Mission. SDG 6, 13.

201810 MarksComment
Sikkim is the first ‘Organic State’ in India. What are the ecological and economical benefits of Organic State?

Question Snapshot

Core Demand: Sikkim organic model — eco-economic benefits
Directive: Comment — analytical view
Syllabus: Sustainable Agriculture; Conservation
References: Sikkim Organic Mission, FAO Award
📌 Introduction

Sikkim became India’s first fully organic state in 2016, converting 75,000+ hectares. Won FAO’s Future Policy Gold Award (2018).

📗 Body – Key Dimensions
  • Ecological: Elimination of chemicals, improved soil health & biodiversity, reduced water pollution, carbon sequestration.
  • Economic: Premium pricing, eco-tourism boost, reduced input costs, global market access, brand value.
  • Social: Better health outcomes, food safety, employment in organic processing.
  • Challenges: Initial yield drop, certification costs, scale-up difficulty.
🏁 Conclusion

Replicable through PKVY and ZBNF. SDG 2, 12, 15.

2

Biodiversity & Conservation

7 Questions
202315 MarksComment
Comment on the National Wetland Conservation Programme initiated by the Government of India and name a few India’s wetlands of international importance included in the Ramsar Sites.

Question Snapshot

Core Demand: NWCP evaluation + Ramsar Sites
Directive: Comment — analytical evaluation
Syllabus: Conservation; Wetlands
References: Ramsar Convention, NWCP, Wetlands Rules 2017
📌 Introduction

Wetlands cover ~4.6% of India’s area. NWCP launched 1985-86. India has 75+ Ramsar Sites (2023), 2nd highest globally.

📗 Body – Key Dimensions
  • NWCP Features: Identification, management action plans, community participation, pollution control, research.
  • Key Ramsar Sites: Chilika (Odisha), Keoladeo (Rajasthan), Loktak (Manipur), Vembanad-Kol (Kerala), Sambhar (Rajasthan), Deepor Beel (Assam), Wular (J&K).
  • Ecological Importance: Flood control, groundwater recharge, biodiversity hotspot, carbon sink, livelihood support.
  • Challenges: Encroachment, pollution, invasive species, siltation, weak enforcement.
🏁 Conclusion

Rapid Ramsar expansion is positive. Need integrated management, community stewardship, stricter 2017 Rules enforcement. SDG 6, 14, 15.

201810 MarksExplain
What is wetland? Explain the Ramsar concept of ‘wise use’ in the context of wetland conservation. Cite two examples of Ramsar sites from India.

Question Snapshot

Core Demand: Wetland definition + Ramsar ‘wise use’ + examples
Directive: Explain — definitional + conceptual
Syllabus: Conservation; Ecology
References: Ramsar Convention 1971
📌 Introduction

Wetlands are transitional zones between land and water. Ramsar Convention (1971) is the oldest intergovernmental environmental treaty. ‘Wise use’ is its cornerstone.

📗 Body – Key Dimensions
  • ‘Wise Use’: Maintaining ecological character while allowing sustainable human use. Balance between conservation and livelihoods.
  • Components: Sustainable extraction, ecosystem-based management, stakeholder participation, regular monitoring.
  • Indian Examples: Chilika Lake — restored from Montreux Record via community management; Vembanad-Kol — largest Indian Ramsar site, supports Kuttanad rice cultivation & fisheries.
🏁 Conclusion

Wise use aligns conservation with development — relevant for India’s densely populated wetland areas. SDG 6, 15.

201815 MarksDiscuss
How does biodiversity vary in India? How is the Biological Diversity Act, 2002 helpful in conservation of flora and fauna?

Question Snapshot

Core Demand: India’s biodiversity variation + BD Act 2002
Directive: Discuss — descriptive + analytical
Syllabus: Biodiversity; Environmental Acts
References: BD Act 2002, NBA, IUCN Red List
📌 Introduction

India is one of 17 mega-diverse countries, hosting ~8% of global biodiversity on 2.4% land. 4 biodiversity hotspots. BD Act 2002 provides institutional framework.

📗 Body – Key Dimensions
  • Variation: Himalayan alpine to tropical rainforests (W. Ghats, NE India), Thar desert, Sundarbans mangroves, coral reefs. 33% flora endemic.
  • BD Act 2002:
    • Three-tier: NBA (National), SBB (State), BMC (Local)
    • Regulates foreign access to biological resources
    • Access and Benefit Sharing — aligned with Nagoya Protocol
    • People’s Biodiversity Registers (PBRs)
    • Biopiracy protection
  • Challenges: Weak enforcement, under-resourced BMCs, slow PBR creation, integration gaps with forest/wildlife laws.
🏁 Conclusion

Progressive legislation needing strengthened implementation. Kunming-Montreal GBF (2022) reinforces commitments. SDG 15.

201612.5 MarksDiscuss
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 of this impact while proposing major developmental projects.

Question Snapshot

Core Demand: EIA & rehabilitation in development projects
Directive: Discuss measures for mitigation
Syllabus: Conservation; EIA; Sustainable Development
References: RFCTLARR Act 2013, Forest Rights Act, EIA 2006
📌 Introduction

Large projects (dams, mines, highways) displace communities. Narmada, POSCO illustrate the development-displacement tension.

📗 Body – Key Dimensions
  • Mitigation Measures: Comprehensive EIA with social impact assessment, FPIC, land-for-land compensation, livelihood restoration, monitoring.
  • Legal Framework: RFCTLARR Act 2013, Forest Rights Act 2006, EIA Notification 2006.
  • Best Practices: Participatory planning, phased relocation, community development funds, skill training.
  • Challenges: Inadequate compensation, delayed rehabilitation, cultural loss, weak enforcement.
🏁 Conclusion

Development must not marginalize communities. Robust SIA, community-driven rehabilitation, judicial oversight needed. SDG 10, 11, 16.

201412.5 MarksDiscuss
Environmental Impact Assessment studies are increasingly undertaken before a project is cleared by the Government. Discuss the environmental impacts of coal-fired thermal plants located at coal pitheads.

Question Snapshot

Core Demand: EIA relevance + pithead thermal plant impacts
Directive: Discuss — multi-dimensional
Syllabus: Conservation; Pollution; EIA
References: EIA 2006, CPCB standards, NGT
📌 Introduction

Pithead thermal plants reduce transport costs but concentrate environmental damage. EIA mandatory under 2006 notification.

📗 Body – Key Dimensions
  • Air Pollution: SO₂, NOx, PM, fly ash; respiratory health impacts.
  • Water: Thermal discharge, heavy metal leaching, ash pond contamination.
  • Land: Fly ash dumps, coal ash ponds, subsidence.
  • Ecological: Forest diversion, biodiversity loss in tribal/forested coal areas.
🏁 Conclusion

Transition to cleaner energy, supercritical tech, fly ash utilization, robust EIA enforcement. SDG 7, 13, 15.

201225 MarksCritically Examine
In the context of the growing demands for the ban of Endosulfan in the country, critically examine the issues involved. What, in your view, should be done in the matter?

Question Snapshot

Core Demand: Endosulfan ban — environmental & health issues
Directive: Critically examine — balanced + opinion
Syllabus: Biodiversity; Pollution; Health
References: Stockholm Convention, Kerala tragedy, SC orders
📌 Introduction

Endosulfan — organochlorine pesticide. Devastating health impacts in Kerala’s Kasaragod district. Listed under Stockholm Convention on POPs (2011).

📗 Body – Key Dimensions
  • Health Impacts: Kasaragod — neurological disorders, birth defects, cancer; bio-accumulation.
  • Environmental: Soil/water contamination, toxic to aquatic life & pollinators; persistent organic pollutant.
  • For Ban: Irreversible damage, international obligations, safer alternatives available.
  • Against Ban (then): Cost-effective for farmers, India was top producer, lack of affordable alternatives.
🏁 Conclusion

India banned Endosulfan (SC 2011, global 2013). Need IPM, bio-pesticides, victim compensation. SDG 3, 12, 15.

20115 MarksComment
Comment on: The diminishing population of vultures.

Question Snapshot

Core Demand: Vulture decline — causes & conservation
Directive: Comment — brief analysis
Syllabus: Biodiversity Conservation
References: Diclofenac ban, Vulture Breeding Programme
📗 Body – Key Dimensions
  • Cause: Diclofenac (veterinary NSAID) caused renal failure in vultures feeding on treated carcasses. 99%+ decline.
  • Consequences: Loss of scavengers → feral dog increase → rabies risk; Parsi sky burial affected.
  • Conservation: Diclofenac veterinary ban (2006), Jatayu Breeding Centres, Vulture Safe Zones, Meloxicam as alternative.
3

Pollution

7 Questions
202310 MarksDiscuss
What is oil pollution? What are its impacts on the marine ecosystem? In what way is oil pollution particularly harmful for a country like India?

Question Snapshot

Core Demand: Oil pollution — definition, marine impacts, India-specific
Directive: Discuss — explanatory + analytical
Syllabus: Pollution; Marine Ecology
References: MARPOL, Coast Guard, National Oil Spill Plan
📌 Introduction

Oil pollution — contamination by petroleum hydrocarbons from spills, shipping, offshore drilling. India imports ~85% crude oil via sea.

📗 Body – Key Dimensions
  • Marine Impacts: Oil slicks block sunlight → phytoplankton death → food chain disruption. Toxic to fish, seabirds, mammals. Coral smothering, mangrove damage.
  • India-Specific: Major shipping route (Hormuz → Indian Ocean); Mumbai/Kochi/Chennai ports; Lakshadweep reefs & Sundarbans vulnerable; 7,500 km coastline fishing communities.
  • Incidents: Mumbai spill (2010), Chennai MV Rak spill (2017).
  • Governance: National Oil Spill Disaster Contingency Plan, MARPOL compliance, Coast Guard role.
🏁 Conclusion

Stronger spill response, green shipping, enhanced coastal surveillance needed. SDG 14.

202210 MarksDiscuss / Explain
Discuss in detail the photochemical smog emphasizing its formation, effects and mitigation. Explain the 1999 Gothenburg Protocol.

Question Snapshot

Core Demand: Photochemical smog + Gothenburg Protocol
Directive: Discuss & Explain
Syllabus: Pollution; Conventions
References: CLRTAP, Gothenburg Protocol, CPCB
📌 Introduction

Photochemical smog — secondary pollutant from NOx + VOCs + sunlight → ground-level ozone & PAN. Major urban air quality issue.

📗 Body – Key Dimensions
  • Formation: Vehicle NOx + industrial VOCs + sunlight → O₃, PAN, formaldehyde. Worse in summer/tropical regions.
  • Effects: Respiratory diseases, eye irritation, crop damage, reduced visibility, material degradation.
  • Mitigation: BS-VI norms, catalytic converters, EVs, public transport, industrial VOC controls, green belts.
  • Gothenburg Protocol: Under UNECE’s CLRTAP — reduces SO₂, NOx, VOCs, NH₃. Multi-pollutant approach. Revised 2012 to include PM2.5.
🏁 Conclusion

India not party to Gothenburg but can draw lessons for NCAP. Integrated multi-pollutant reduction is key. SDG 3, 11.

201910 MarksAnalyse
Coastal sand mining, whether legal or illegal, poses one of the biggest threats to our environment. Analyze the impact of sand mining along the Indian coasts, citing specific examples.

Question Snapshot

Core Demand: Impact of coastal sand mining
Directive: Analyse with examples
Syllabus: Pollution; Coastal Ecosystems
References: CRZ Notification, NGT, UNEP sand report
📌 Introduction

India’s construction boom drives massive sand demand. Coastal mining — often illegal — threatens shorelines, marine ecosystems, communities.

📗 Body – Key Dimensions
  • Environmental: Coastal erosion, loss of storm barriers (dunes), groundwater salinization, turtle nesting habitat loss, mangrove disruption.
  • Examples: Kerala — severe beach erosion; Tamil Nadu — Ennore creek damage; Maharashtra — illegal creek mining affecting Mumbai.
  • Socio-economic: Fishing community losses, sand mafia violence, livelihood disruption.
  • Regulatory: CRZ provisions, Sustainable Sand Mining Guidelines (2016), NGT orders, weak enforcement.
🏁 Conclusion

M-sand promotion, satellite monitoring, UNEP guidelines on sustainable extraction. SDG 14, 15.

201310 MarksDiscuss
What are the consequences of Illegal mining? Discuss the Ministry of Environment and Forest’s concept of GO AND NO GO zones for coal mining sector.

Question Snapshot

Core Demand: Illegal mining impacts + Go/No-Go zones
Directive: Discuss
Syllabus: Pollution; Conservation; Policy
References: Shah Commission, Forest Advisory Committee
📗 Body – Key Dimensions
  • Consequences: Deforestation, biodiversity loss, land degradation, water contamination, air pollution, tribal displacement, revenue loss, mafia violence.
  • Go/No-Go Zones: MoEFCC categorized forests by canopy density. No-Go (>10% canopy) — mining barred; Go — allowed with conditions. Balances energy security with forest conservation.
  • Challenges: Norm dilution under industry pressure, reclassification controversies, weak monitoring.
201310 MarksDiscuss
Enumerate the National Water Policy of India. Taking river Ganges as an example, discuss the strategies which may be adopted for river water pollution control and management. What are the legal provisions of management and handling of hazardous wastes in India?

Question Snapshot

Core Demand: NWP + Ganga pollution + hazardous waste laws
Directive: Discuss — multi-part
Syllabus: Pollution; Acts
References: NWP 2012, Namami Gange, Hazardous Waste Rules
📗 Body – Key Dimensions
  • NWP 2012: Water as economic good, ecological needs, minimum flow, river basin approach, participatory management, pricing reforms.
  • Ganga Strategies: Namami Gange — STPs, industrial regulation, riverfront development, dolphin conservation, afforestation, Ganga Task Force.
  • Hazardous Waste: HW Rules 2016, E-waste Rules, Basel Convention compliance, CPCB oversight, polluter pays principle.
201012 MarksDiscuss
Bring out the salient features of the evolution and the current status of the ‘Bharat Stage’ vehicle emission norms in the country.

Question Snapshot

Core Demand: BS emission norms — evolution & status
Directive: Discuss — descriptive
Syllabus: Pollution; Environmental Policy
References: CPCB, MoRTH, Auto Fuel Policy
📗 Body – Key Dimensions
  • Evolution: BS-I (2000) → BS-II (2005) → BS-III (2010) → BS-IV (2017) → BS-VI (2020, skipping BS-V). Based on Euro norms.
  • BS-VI Features: 70% NOx reduction for diesel, 25% for petrol. OBD, real driving tests, particulate filters mandatory.
  • Impact: Significant urban air quality improvement potential, fuel quality upgrade (10 ppm sulfur), technology push.
20105 MarksComment
Comment on the recent HFC-23 emissions controversy that includes in its ambit some Indian companies.

Question Snapshot

Core Demand: HFC-23 CDM controversy
Directive: Comment — brief analysis
Syllabus: Pollution; Climate Change
References: CDM, Kigali Amendment
📗 Body – Key Dimensions
  • HFC-23 is potent GHG (14,800x CO₂), byproduct of HCFC-22 production.
  • Companies allegedly increased HCFC-22 to generate more HFC-23 for CDM credits — perverse incentive.
  • EU banned HFC-23 credits. Kigali Amendment (2016) now phases down HFCs globally.
4

Environmental Acts & Policies

6 Questions
202010 MarksCompare
How does the draft Environment Impact Assessment (EIA) Notification, 2020 differ from the existing EIA Notification, 2006?

Question Snapshot

Core Demand: Draft EIA 2020 vs EIA 2006
Directive: Compare & Differentiate
Syllabus: Environmental Acts
References: EIA 2006, draft 2020, EPA 1986
📌 Introduction

EIA is a preventive governance tool under EPA 1986. Draft EIA 2020 attracted widespread debate on dilution of safeguards.

📗 Body – Key Dimensions
  • Post-facto Clearance: Draft 2020 allows ex-post-facto clearance on penalty — incentivizes violations; 2006 had no such provision.
  • Public Consultation: Reduced 30→20 days; expanded exemptions from public hearings (B2 category).
  • Compliance Reports: Changed half-yearly→annual — reduces monitoring.
  • Exemptions: Defence & national security projects exempted — blanket exemption concerns.
  • Positives: Digitized process, increased penalties, district monitoring cells.
🏁 Conclusion

EIA reform must strengthen, not dilute, governance. Need robust public participation, independent assessment. SDG 16.

202010 MarksDiscuss
What are the salient features of the Jal Shakti Abhiyan launched by the Government of India for water conservation and water security?

Question Snapshot

Core Demand: Jal Shakti Abhiyan features
Directive: Discuss — descriptive
Syllabus: Environmental Policy; Water
References: Jal Shakti Ministry, NITI Aayog Water Index
📗 Body – Key Dimensions
  • Features: Campaign-based (not scheme), 256 water-stressed districts, 5 interventions: rainwater harvesting, traditional water body renovation, reuse & recharge, watershed development, afforestation.
  • Implementation: Central officers deployed, convergence with MGNREGA & Jal Jeevan Mission.
  • Significance: NITI Aayog: 21 cities may run out of water by 2030. Creates urgency and community awareness.
  • Limitations: Short campaign duration, sustainability concerns, needs structural reforms.
202015 MarksDiscuss
What are the key features of the National Clean Air Programme (NCAP) initiated by the Government of India?

Question Snapshot

Core Demand: NCAP — objectives, features, implementation
Directive: Discuss key features
Syllabus: Environmental Policy; Pollution
References: NCAP 2019, CPCB, WHO AQGs
📌 Introduction

Launched January 2019 — India’s first comprehensive long-term air pollution strategy. Targets 20-30% PM reduction by 2024, revised to 40% by 2025-26.

📗 Body – Key Dimensions
  • Coverage: 131 non-attainment cities exceeding NAAQS.
  • Features: City-specific action plans, augmented monitoring, source apportionment, technology assessment, public awareness.
  • Implementation: Convergence with Smart Cities, AMRUT, Swachh Bharat. 15th FC grants linked to air quality.
  • Challenges: Non-binding targets, funding gaps, inter-state sources (crop burning), weak enforcement capacity.
🏁 Conclusion

NCAP needs legal teeth, adequate funding, airshed management approach. SDG 3, 11.

201512.5 MarksDiscuss
Discuss the Namami Gange and National Mission for Clean Ganga (NMCG) programmes and causes of mixed results from the previous schemes. What quantum leaps can help preserve the river Ganga better than incremental inputs?

Question Snapshot

Core Demand: Namami Gange evaluation + way forward
Directive: Discuss + Suggest
Syllabus: Environmental Policy; Pollution
References: Namami Gange, GAP I & II, NGT
📗 Body – Key Dimensions
  • Previous Failures (GAP I & II): Only STPs, ignored industrial effluents, no community ownership, corruption, poor maintenance.
  • Namami Gange (2014): Integrated: sewage management, surface cleaning, biodiversity conservation (dolphin, turtle), afforestation, community participation, industrial monitoring.
  • Quantum Leaps: Zero liquid discharge for industries, decentralized sewage treatment, ecological flow enforcement, river-centric urban planning, bioremediation, real-time water quality monitoring.
20115 MarksComment
Comment on: Phase-IV of the tiger monitoring programme in India.

Question Snapshot

Core Demand: Tiger monitoring Phase IV
Directive: Comment
Syllabus: Biodiversity Conservation; Policy
References: NTCA, Project Tiger
📗 Body – Key Dimensions
  • World’s largest wildlife survey — All India Tiger Estimation every 4 years under NTCA.
  • Phase IV: camera traps, DNA analysis, GIS mapping, double-sampling framework.
  • Recovery: 1,411 (2006) → 3,167 (2022) — conservation success.
  • Challenges: habitat fragmentation, human-wildlife conflict, poaching, corridor connectivity.
201012 MarksComment
Comment on the spatial components in urban solid waste management in the country.

Question Snapshot

Core Demand: Spatial aspects of urban SWM
Directive: Comment — analytical
Syllabus: Environmental Policy; Waste Management
References: SWM Rules 2016, Swachh Bharat
📗 Body – Key Dimensions
  • Spatial Components: Collection points, transfer stations, processing facilities, landfill sites — all need spatial planning based on density, land use, transport.
  • Challenges: NIMBY for landfills, inadequate land, informal sector not integrated, lack of decentralized processing.
  • Way Forward: GIS-based route optimization, decentralized composting, waste-to-energy, segregation at source, EPR.
5

Renewable & Energy Resources

7 Questions
202315 MarksDiscuss
The adoption of electric vehicles is rapidly growing worldwide. How do electric vehicles contribute to reducing carbon emissions and what are the key benefits they offer compared to traditional combustion engine vehicles?

Question Snapshot

Core Demand: EVs — emission reduction + comparative benefits
Directive: Discuss — explanatory
Syllabus: Renewable Energy; Climate Change
References: FAME-II, IEA EV Outlook
📌 Introduction

Transport = ~24% global CO₂. EVs are zero tailpipe emissions with higher energy efficiency. India’s FAME-II driving adoption.

📗 Body – Key Dimensions
  • Emission Reduction: Zero tailpipe; lifecycle 50-70% lower than ICE; improves as grid greens.
  • Benefits over ICE: 85-90% energy efficiency vs 20-35%, lower running costs, less noise pollution, reduced PM2.5/NOx, cuts oil import dependency.
  • Challenges: Battery manufacturing footprint, charging infra gaps, grid capacity, upfront cost, battery recycling.
  • India’s Initiatives: FAME-II, National Electric Mobility Mission, PLI for Advanced Chemistry Cells, state EV policies, battery swapping.
🏁 Conclusion

Critical for NDCs and net-zero. Need circular economy for batteries, RE-powered charging, affordable models. SDG 7, 11, 13.

202215 MarksJustify / Explain
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.

Question Snapshot

Core Demand: India’s 50% RE target + subsidy shift analysis
Directive: Justify + Explain
Syllabus: Renewable Energy; Policy
References: India’s NDC, COP26, ISA, MNRE
📌 Introduction

At COP26: 500 GW non-fossil capacity by 2030, 50% energy from renewables. Currently ~180+ GW RE — ambitious but achievable.

📗 Body – Key Dimensions
  • Positive Signs: Solar tariffs at ₹2/kWh, massive solar parks, PM-KUSUM, green hydrogen mission, ISA leadership, private investment surge.
  • Challenges: Land acquisition, grid integration of intermittent RE, storage gaps, China dependency for solar cells, DISCOM health, just transition for coal regions.
  • Subsidy Shift: India spends ~₹2L cr on fossil subsidies. Redirecting to RE funds grid storage, EV infra, rooftop solar. Creates level playing field, accelerates private investment.
🏁 Conclusion

Ambitious but achievable with political will, subsidy reform, storage investment, manufacturing push (PLI). SDG 7, 13.

202015 MarksDescribe
Describe the benefits of deriving electric energy from sunlight in contrast to the conventional energy generation. What are the initiatives offered by our Government for this purpose?

Question Snapshot

Core Demand: Solar energy benefits + govt initiatives
Directive: Describe & Discuss
Syllabus: Renewable Energy
References: JNNSM, PM-KUSUM, ISA
📗 Body – Key Dimensions
  • Benefits: Zero emissions, abundant (300+ sunny days), declining costs, decentralized generation (rooftop), reduced imports, jobs, scalable.
  • Vs Conventional: No fuel cost, no water use (unlike thermal), no air/water pollution, no mining impacts.
  • Govt Initiatives: JNNSM (100 GW target), PM-KUSUM (solar pumps), rooftop solar scheme, solar parks (Bhadla, Pavagada), ISA, PLI for solar manufacturing, Green Energy Corridor.
201512.5 MarksAnalyse
To what factors can the recent dramatic fall in equipment cost and tariff of solar energy be attributed? What implications does the trend have for thermal power producers and related industry?

Question Snapshot

Core Demand: Solar cost decline factors + thermal implications
Directive: Analyse — cause-effect
Syllabus: Renewable Energy; Industry
References: IRENA, CERC, Swanson’s law
📗 Body – Key Dimensions
  • Cost Decline Factors: China’s manufacturing scale, technology improvement, competitive bidding, policy support (RPOs), global oversupply, Swanson’s law.
  • Thermal Implications: Stranded assets risk, financial stress on generators, just transition needs, coal-state revenue loss, banking NPAs from thermal loans.
  • Way Forward: Retrofitting, coal gasification, just transition framework, worker retraining.
201310 MarksComment
Write a note on India’s green energy corridor to alleviate the problem of conventional energy.

Question Snapshot

Core Demand: Green Energy Corridor features
Directive: Comment
Syllabus: Renewable Energy; Infrastructure
References: MNRE, PGCIL
📗 Body – Key Dimensions
  • Dedicated transmission infrastructure to evacuate RE power from generation hubs to load centres.
  • Two components: Intra-state (8 RE-rich states) and Inter-state (PGCIL — national grid connection).
  • Solves intermittency via grid balancing, reduces RE curtailment, enables larger RE integration.
  • Complemented by battery storage and smart grid initiatives.
20135 MarksExplain
What do you understand by Run-of-river hydroelectricity project? How is it different from any other hydroelectricity project?

Question Snapshot

Core Demand: Run-of-river vs conventional hydro
Directive: Explain & Differentiate
Syllabus: Renewable Energy
References: NHP, Small Hydro Policy
📗 Body – Key Dimensions
  • Run-of-river: Uses natural river flow, minimal/no storage, diverts water through turbines and returns downstream.
  • Vs Conventional: No large dam/reservoir → less displacement, lower ecological impact, less submergence. But output varies seasonally, less flood control.
  • Examples: NE India, Himachal Pradesh small hydro projects.
20115 MarksComment
Comment on: ‘Concentrated’ solar energy and ‘photovoltaic’ solar energy.

Question Snapshot

Core Demand: CSP vs PV comparison
Directive: Comment — brief
Syllabus: Renewable Energy
References: JNNSM
📗 Body – Key Dimensions
  • CSP: Mirrors/lenses concentrate sunlight → heat fluid → steam → turbine. Advantage: thermal storage for night generation. Needs direct sun, large land, water.
  • PV: Semiconductor cells convert sunlight to electricity directly. Scalable, declining costs, no water needed, works in diffused light. Dominant globally.
  • India: Largely favours PV due to cost advantage and versatility.
6

Sustainable Development

3 Questions
201915 MarksDefine / Explain
Define the concept of carrying capacity of an ecosystem as relevant to an environment. Explain how understanding this concept is vital while planning for sustainable development of a region.

Question Snapshot

Core Demand: Carrying capacity + sustainable development
Directive: Define & Explain
Syllabus: Sustainable Development; Ecology
References: Ecological Footprint, SDGs, CBD
📌 Introduction

Carrying capacity — maximum population an ecosystem can sustain indefinitely. When exceeded, ecosystem services collapse.

📗 Body – Key Dimensions
  • Concept: Determined by resource availability, waste absorption, regenerative ability. Dynamic — changes with technology and consumption.
  • Planning Relevance: Tourism CC (Shimla overcrowding), urban CC (Delhi’s air/water limits), agricultural CC (Punjab groundwater). Exceeding leads to ecological overshoot.
  • Application: EIA studies, CRZ regulations, eco-sensitive zones, groundwater regulation — all implicitly use this concept.
  • Global Context: Ecological Footprint — humanity uses 1.75 Earths. Earth Overshoot Day arrives earlier each year.
🏁 Conclusion

Development planning must respect ecological limits. Integrating carrying capacity into EIA and urban planning is imperative. SDG 11, 15.

201710 MarksDiscuss
Not many years ago, river linking was a concept but it is becoming reality in the country. Discuss the advantages of river linking and its possible impact on the environment.

Question Snapshot

Core Demand: River linking — advantages + environmental impact
Directive: Discuss — balanced
Syllabus: Sustainable Development; Water
References: National River Linking Project, Ken-Betwa
📗 Body – Key Dimensions
  • Advantages: Flood mitigation in surplus basins, drought relief in deficit areas, irrigation expansion, hydropower generation, inland navigation, groundwater recharge.
  • Environmental Concerns: Massive ecological disruption, river ecosystem fragmentation, wetland destruction, displacement, downstream impacts, inter-state water disputes, climate change uncertainty.
  • Ken-Betwa Link: First project approved — links surplus Ken (MP) to deficit Betwa. Concerns about submergence of Panna Tiger Reserve forest.
🏁 Conclusion

Need comprehensive EIA, cumulative impact assessment, and climate-proofing. Demand-side management (micro-irrigation, crop diversification) should complement supply augmentation. SDG 6, 15.

20125 MarksExplain
Explain the concepts ‘Environmental Sustainability’ and ‘Sustainable Development of People’.

Question Snapshot

Core Demand: Two concepts — definition & linkage
Directive: Explain — clarity
Syllabus: Sustainable Development
References: Brundtland Report, UNDP HDR, SDGs
📗 Body – Key Dimensions
  • Environmental Sustainability: Maintaining ecological processes and natural resources for future generations within planetary boundaries.
  • Sustainable Development of People: UNDP’s human development approach — expanding choices (health, education, livelihood) while ensuring environmental integrity.
  • Linkage: Both converge in SDGs — 17 goals integrating social, economic, and environmental dimensions.
7

Environmental Organisations & Conventions

10 Questions
202110 MarksExplain
Explain the purpose of the Green Grid Initiative launched at World Leaders Summit of the COP26 UN Climate Change Conference in Glasgow in November, 2021. When was this idea first floated in the International Solar Alliance (ISA)?

Question Snapshot

Core Demand: Green Grid Initiative + ISA origin
Directive: Explain
Syllabus: Organisations; Renewable Energy
References: COP26, ISA, OSOWOG
📗 Body – Key Dimensions
  • Green Grid Initiative (GGI): ‘One Sun One World One Grid’ — interconnected global solar energy grid to ensure 24/7 clean energy. Launched at COP26 by India-UK.
  • Purpose: Enable cross-border RE trade, balance supply-demand across time zones, accelerate clean energy access globally, reduce storage needs.
  • ISA Origin: Concept first floated by PM Modi at ISA Assembly (2018). ISA (HQ: Gurugram) launched 2015 in Paris.
202110 MarksDescribe / Compare
Describe the key points of the revised Global Air Quality Guidelines (AQGs) recently released by the World Health Organisation (WHO). How are these different from its last update in 2005? What changes in India’s National Clean Air Programme are required to achieve these revised standards?

Question Snapshot

Core Demand: WHO AQGs 2021 vs 2005 + NCAP implications
Directive: Describe & Compare
Syllabus: Organisations; Pollution
References: WHO AQGs, NCAP, CPCB NAAQS
📗 Body – Key Dimensions
  • Revised AQGs (2021): PM2.5 annual: 5 μg/m³ (was 10); PM10 annual: 15 (was 20); NO₂ annual: 10 (was 40); SO₂ 24-hr: 40 (was 20). Much stricter based on new health evidence.
  • Key Difference: 2021 guidelines are significantly tighter, reflecting evidence that health damage occurs at lower levels than previously thought.
  • NCAP Changes Needed: Revise NAAQS to align with WHO, strengthen monitoring network, source apportionment in all cities, sector-specific interventions (transport, industry, construction, biomass), airshed approach, legally binding targets.
202115 MarksDescribe
Describe the major outcomes of the 26th session of the Conference of the Parties (COP) to the United Nations Framework Convention on Climate Change (UNFCCC). What are the commitments made by India in this conference?

Question Snapshot

Core Demand: COP26 outcomes + India’s commitments
Directive: Describe
Syllabus: Organisations; Climate Change
References: Glasgow Climate Pact, India’s Panchamrit
📌 Introduction

COP26 (Glasgow, 2021) was pivotal — first explicit mention of fossil fuels in a COP decision.

📗 Body – Key Dimensions
  • Major Outcomes: Glasgow Climate Pact — ‘phase down’ coal, methane pledge, deforestation halt by 2030, Article 6 carbon market rules finalized, enhanced NDC submissions, climate finance push.
  • India’s Panchamrit:
    • 500 GW non-fossil capacity by 2030
    • 50% energy from renewables by 2030
    • Reduce carbon intensity by 45% (vs 2005)
    • Reduce 1 billion tonnes CO₂ by 2030
    • Net-zero by 2070
  • Assessment: India’s commitments ambitious for a developing nation. Coal phase-down (not phase-out) language reflects India’s energy transition reality.
🏁 Conclusion

India playing leadership role while balancing development needs. SDG 7, 13, 17.

201412.5 MarksDiscuss
Should the pursuit of carbon credits and clean development mechanisms set up under UNFCCC be maintained even though there has been a massive slide in the value of a carbon credit? Discuss with respect to India’s energy needs for economic growth.

Question Snapshot

Core Demand: CDM & carbon credits viability for India
Directive: Discuss — analytical + opinion
Syllabus: Organisations; Climate Change
References: UNFCCC, CDM, Paris Agreement
📗 Body – Key Dimensions
  • CDM Benefits for India: Revenue from emission reduction projects, technology transfer, sustainable development co-benefits, incentive for cleaner production.
  • Challenges: Carbon credit price collapse (~€0.50 from €30+), additionality concerns, bureaucratic complexity, limited environmental impact.
  • India’s Perspective: CDM projects generated billions; but India needs massive energy expansion. Balance between climate commitments and growth is critical.
  • Evolution: Paris Agreement’s Article 6 replaces CDM with new market mechanisms. India should shape new carbon market rules to its advantage.
201215 MarksAnalyse
Analyse critically the interlinkages between the Convention on Biological Diversity and FAO Treaty on Plant Genetic Resources for Food and Agriculture.

Question Snapshot

Core Demand: CBD vs FAO Treaty interlinkages
Directive: Analyse — critical
Syllabus: Organisations; Biodiversity
References: CBD, ITPGRFA, Nagoya Protocol
📗 Body – Key Dimensions
  • CBD: Broad biodiversity conservation, sustainable use, access & benefit sharing (ABS). Nagoya Protocol operationalizes ABS.
  • FAO ITPGRFA: Specific to crop genetic resources. Multilateral System — facilitated access to 64 crops. Standard Material Transfer Agreement (SMTA).
  • Interlinkages: Both address ABS but different scope. ITPGRFA is ‘lex specialis’ for crops. Potential conflicts in ABS provisions. Need harmonization for farmers’ rights and food security.
20125 MarksExplain
Explain briefly the ‘Clean Development Mechanism’ as provided under the United Nations Framework Convention on Climate Change (UNFCCC).

Question Snapshot

Core Demand: CDM explanation
Directive: Explain — brief
Syllabus: Organisations; Climate
References: UNFCCC, Kyoto Protocol
📗 Body – Key Dimensions
  • CDM under Kyoto Protocol: allows Annex I (developed) countries to invest in emission reduction projects in developing countries.
  • Generates Certified Emission Reductions (CERs) — carbon credits tradeable in carbon markets.
  • Dual purpose: helps developed nations meet targets cost-effectively + promotes sustainable development in host countries.
  • India was 2nd largest CDM host (after China). Projects in wind, biomass, energy efficiency, waste management.
201012 MarksComment
Comment on the present status of the Biological Weapons Convention (BWC). What important issues, do you think, need to be taken up at the seventh review conference of the BWC scheduled for 2011?

Question Snapshot

Core Demand: BWC status + review issues
Directive: Comment — analytical
Syllabus: Organisations; Security; Environment
References: BWC 1972, BTWC Review Conference
📗 Body – Key Dimensions
  • BWC Status: In force since 1975. Bans development/production/stockpiling of biological weapons. 183 states parties. Key weakness: no verification mechanism.
  • Issues for Review: Verification protocol (US opposition), dual-use technology governance, bioterrorism threats, synthetic biology developments, capacity building for developing nations.
201012 MarksDiscuss
List any eight ‘Ramsar’ wetland sites located in India. What is the ‘Montreux Record’ and what Indian sites are included in this Record?

Question Snapshot

Core Demand: Indian Ramsar sites + Montreux Record
Directive: Discuss
Syllabus: Organisations; Conservation
References: Ramsar Convention
📗 Body – Key Dimensions
  • Eight Ramsar Sites: Chilika (Odisha), Keoladeo (Rajasthan), Wular (J&K), Loktak (Manipur), Harike (Punjab), Sambhar (Rajasthan), Vembanad-Kol (Kerala), Deepor Beel (Assam).
  • Montreux Record: Register of Ramsar sites where ecological character has changed or is changing due to human interference. A ‘red flag’ list.
  • Indian Sites on Montreux: Keoladeo (Rajasthan) and Loktak Lake (Manipur) were listed. Chilika was removed after successful restoration.
20105 MarksComment
Comment on: Rotterdam Convention.

Question Snapshot

Core Demand: Rotterdam Convention
Directive: Comment — brief
Syllabus: Organisations
References: Rotterdam Convention, PIC Procedure
📗 Body – Key Dimensions
  • Rotterdam Convention (1998, force 2004): governs international trade in hazardous chemicals and pesticides.
  • Prior Informed Consent (PIC) procedure — exporting country must get importing country’s consent before shipping listed hazardous chemicals.
  • Promotes shared responsibility and informed decision-making. Covers ~50 chemicals including asbestos, pesticides.
20105 MarksDifferentiate
In the context of the United Nations Framework Convention on Climate Change (UNFCCC), distinguish between ‘Annex I’ and ‘Annex II’ countries.

Question Snapshot

Core Demand: Annex I vs Annex II countries
Directive: Differentiate
Syllabus: Organisations; Climate Change
References: UNFCCC, CBDR principle
📗 Body – Key Dimensions
  • Annex I: Industrialized countries + economies in transition (41 countries). Have binding emission reduction targets under Kyoto Protocol.
  • Annex II: Subset of Annex I — only developed (OECD) countries. Additional obligation: provide financial resources and technology transfer to developing nations.
  • Key Distinction: All Annex II are Annex I, but not vice versa. Russia, Ukraine are Annex I but not Annex II. Reflects CBDR principle.
8

Wetlands, Ecology & Ecosystems

4 Questions
201810 MarksExplain
What is wetland? Explain the Ramsar concept of ‘wise use’ in the context of wetland conservation. Cite two examples of Ramsar sites from India.

Question Snapshot

Core Demand: Wetland + Ramsar ‘wise use’ + examples
Directive: Explain
Syllabus: Ecology & Ecosystem; Conservation
References: Ramsar Convention 1971
📌 Introduction

Wetlands are transitional zones (marshes, swamps, bogs, floodplains). Ramsar Convention (1971) — ‘wise use’ is its cornerstone.

📗 Body – Key Dimensions
  • ‘Wise Use’: Maintaining ecological character while allowing sustainable human use. Balance conservation and livelihoods. People-wetland interdependence recognized.
  • Components: Sustainable extraction, ecosystem management, stakeholder participation, ecological monitoring.
  • Indian Examples: Chilika Lake — community-led restoration, removed from Montreux Record; Vembanad-Kol — largest Indian Ramsar site, Kuttanad farming.
🏁 Conclusion

Wise use aligns conservation with development. SDG 6, 15.

201012 MarksDiscuss
What is phytoremediation? Discuss its applications.

Question Snapshot

Core Demand: Phytoremediation concept & applications
Directive: Discuss
Syllabus: Ecology; Pollution
References: EPA studies, bioremediation research
📗 Body – Key Dimensions
  • Definition: Use of plants to remove, degrade, or contain environmental contaminants (heavy metals, pesticides, solvents) from soil, water, or air.
  • Types: Phytoextraction (metal uptake), phytostabilization (immobilize contaminants), phytodegradation (break down organics), rhizofiltration (root absorption from water).
  • Applications: Mine site remediation, industrial wastewater treatment, constructed wetlands for sewage, radioactive site cleanup, agricultural runoff treatment.
  • Advantages: Cost-effective, eco-friendly, aesthetically pleasing, applicable to large areas. Limitations: slow, species-specific, seasonal.
20115 MarksComment
Comment on: The scourge of e-waste.

Question Snapshot

Core Demand: E-waste challenges
Directive: Comment — brief
Syllabus: Ecology; Waste Management
References: E-waste Rules, Basel Convention
📗 Body – Key Dimensions
  • E-waste — discarded electronic devices (phones, computers, TVs). India generates ~3.2 million tonnes/year.
  • Hazards: lead, mercury, cadmium, BFRs; informal recycling exposes workers (Seelampur, Delhi) to toxic fumes.
  • E-waste Rules 2016: Extended Producer Responsibility (EPR), authorized dismantlers, collection targets.
  • Need: formal recycling infrastructure, urban mining for resource recovery, consumer awareness.
201810 MarksDiscuss
What are the impediments in disposing the huge quantities of discarded solid wastes which are continuously being generated? How do we remove safely the toxic wastes that have been accumulating in our habitable environment?

Question Snapshot

Core Demand: Solid waste disposal impediments + toxic waste solutions
Directive: Discuss
Syllabus: Ecology; Waste Management
References: SWM Rules 2016, HW Rules, CPCB
📗 Body – Key Dimensions
  • Impediments: Lack of segregation at source, inadequate processing infrastructure, NIMBY for landfills, poor ULB capacity, informal sector not integrated, low awareness, funding gaps.
  • Toxic Waste Solutions: Secured landfills, high-temperature incineration, bioremediation, chemical treatment, phytoremediation, common hazardous waste treatment facilities (CHTWFs).
  • Governance: SWM Rules 2016, HW Rules 2016, Swachh Bharat Mission, Extended Producer Responsibility, polluter pays principle.
🏁 Conclusion

Circular economy approach — reduce, reuse, recycle. Waste-to-wealth mindset needed. SDG 11, 12.

PYQ Heat Map — Pareto Analysis (80:20 Rule)

This heat map shows the frequency of questions from each Environment sub-topic across years. Use the 80:20 Pareto principle — focus on the high-frequency topics that yield maximum marks coverage.

Sub-Topic20102011201220132014201520162017201820192020202120222023TOTAL
Climate Change010000011000216
Biodiversity & Conservation012010102000018
Pollution200200000100117
Env. Acts & Policies110001000030006
Renewable & Energy010201100010118
Sustainable Development001000010100003
Organisations & Conventions302010000003009
Wetlands & Ecosystems110000002000004

🎯 Pareto Analysis — 80:20 Focus Strategy

Focusing on the top 4 topics covers ~60%+ of all Environment questions asked. These are your high-ROI preparation areas:

  • 1Organisations & Conventions
    9 Questions
  • 2Biodiversity & Conservation
    8 Questions
  • 3Renewable & Energy Resources
    8 Questions
  • 4Pollution
    7 Questions

Strategy: Master these 4 topics first → then cover Climate Change & Acts/Policies → finally Sustainable Development & Wetlands. This ensures maximum marks with focused effort.

PYQ Trend Insights & Exam Strategy

📊 Topic Frequency Pattern

  • Consistently asked: Renewable Energy and Biodiversity appear almost every 2 years
  • Cyclical: Organisations & Conventions peaks when global summits happen (COP years: 2010, 2012, 2021)
  • Rising: Climate Change questions increasing post-2017 — linked to IPCC reports and COP outcomes
  • Declining: Pure conceptual questions (definitions) are being replaced by analytical, policy-oriented questions

🎯 High-Weightage Areas (15 Marks)

  • Climate Change + Sea Level Rise / IPCC
  • Renewable Energy targets + Government schemes
  • COP outcomes + India’s commitments (Panchamrit)
  • Biodiversity Act + Conservation programmes
  • NCAP, EIA notifications, Namami Gange
  • EV adoption + Energy transition

📈 Emerging Themes for 2024-25

  • Green Hydrogen Mission & National Green Hydrogen Policy
  • Carbon markets — India’s carbon credit trading scheme
  • Deep ocean mission & blue economy
  • Kunming-Montreal GBF (30×30 targets)
  • Climate finance — Loss & Damage Fund operationalization
  • Forest Conservation Amendment Act 2023
  • Plastic waste management & EPR
  • Critical minerals & rare earths for energy transition

📝 UPSC Question Framing Patterns

  • Statement + Comment: “IPCC has predicted… What would be its impact?” — needs data-backed analysis
  • Scheme evaluation: “Comment on NWCP / NCAP / Namami Gange” — needs features + critique + way forward
  • Comparison: “How does draft EIA 2020 differ from 2006?” — tabular approach works well
  • Contemporary linkage: Questions tied to recent events (COP26, Chandrayaan, EVs) — stay updated
  • Multi-part: Many questions have 2-3 sub-parts — address each explicitly for full marks

✅ Legacy IAS — Exam Day Reminders

  • Always open with data/definition/current context — shows knowledge depth
  • Use diagrams where possible (flowcharts for mechanisms, maps for regional impacts)
  • Cite recent reports — IPCC AR6, UNEP, State of Forest Report, Economic Survey
  • Include case studies — Sundarbans, Sikkim Organic, Chilika restoration, Bhadla Solar Park
  • End with SDG linkage + Government initiative + Way forward
  • For 10-mark questions: ~150 words | For 15-mark questions: ~250 words

Prepared for Legacy IAS

UPSC Mains GS Paper III — Environment | Topic-Wise PYQ Analysis (2010–2023)

Prepared for Legacy IAS — UPSC Mains (GS-III Environment) | Complete PYQ Bank with Answer Frameworks

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