Environmental Laws, EIA & Pollution Geography of India
Overview
India's environmental governance rests on a layered architecture of constitutional provisions, central legislation, regulatory bodies, and international treaty obligations. From the Protection of Wildlife (Protection) Act 1972 to the Green Credit Programme 2023, India has built one of Asia's most comprehensive environmental law frameworks — though enforcement remains patchy.
For UPSC, environmental laws and institutions are among the most tested topics across all three papers (GS1, GS2, GS3). The EIA process, NCAP, CAMPA, Forest Rights Act, and pollution geography appear almost every year in Prelims. This chapter consolidates all major laws, the EIA process, pollution hotspots, and key regulatory institutions.
Key Fact: India's National Clean Air Programme (NCAP, 2019) targets 40% reduction in PM2.5 and PM10 concentrations by 2026 in 131 non-attainment cities. In IQAir's World Air Quality Report 2024, India is home to 12 of the world's 20 most polluted cities — with the Indo-Gangetic Plain (IGP) being the most polluted airshed in Asia.
Constitutional Framework
Fundamental Rights and Duties
| Article | Provision |
|---|---|
| Article 21 | Right to life — interpreted by SC to include right to clean environment (Subhash Kumar v. State of Bihar, 1991) |
| Article 48A (DPSP, added 1976) | State shall endeavour to protect and improve the environment and safeguard forests and wildlife |
| Article 51A(g) (Fundamental Duty, 1976) | It shall be the duty of every citizen to protect and improve the natural environment including forests, lakes, rivers, and wildlife |
Significance: Articles 48A and 51A(g) were added by the 42nd Constitutional Amendment (1976) in the aftermath of the Stockholm Conference on Environment (1972) — India's first constitutional environmental commitments.
Legislative Competence
| List | Environment-related Entry |
|---|---|
| Entry 17, State List | Water, irrigation, drainage, fisheries |
| Entry 17B, Concurrent List | Protection of wild animals and birds |
| Entry 17A, Concurrent List | Forests |
| Entry 20, Concurrent List | Economic and social planning |
| Entry 13, Union List | Participation in international conferences (Stockholm, Rio, Paris Agreement) |
Concurrent List entries mean both Centre and States can legislate; Central law prevails in case of inconsistency.
Major Environmental Laws — Chronological
Wildlife (Protection) Act, 1972
| Feature | Detail |
|---|---|
| Enacted | 1972 — India's foundational wildlife protection law |
| Amendment | Wildlife (Protection) Amendment Act 2022 — significant overhaul |
| Schedule I | Highest protection; hunting absolutely prohibited; Appendix I species |
| Schedule II | Protected species |
| Schedule IV | Vermin (removed in 2022 amendment) |
| New schedules (2022) | Schedules I–IV consolidated; CITES Appendix I–III species now listed under Schedule I |
| Penalties | Increased significantly in 2022 amendment |
| Protected Areas | Defines National Parks, Wildlife Sanctuaries, Conservation Reserves, Community Reserves |
| Central Zoo Authority | Regulates zoos |
| Tiger conservation | Project Tiger (1973) functions under this Act; National Tiger Conservation Authority (NTCA) |
Key provisions of 2022 Amendment:
- Aligned India's species schedules with CITES Appendices (1, 2, 3)
- Strengthened protections for invasive alien species
- Enhanced penalties for trade in listed species
Forest (Conservation) Act, 1980
| Feature | Detail |
|---|---|
| Enacted | 1980 |
| Renamed | Forest (Conservation) Amendment Act 2023 renamed it Van (Sanrakshan Evam Samvardhan) Adhiniyam 2023 |
| Core provision | Any diversion of forest land for non-forest purposes requires prior approval of Central Government |
| Controversy (2023 Amendment) | Excluded land within 100 km of international borders from forest definition (for strategic infrastructure); critics concerned about Himalayan forests |
| NPV | Non-forest users must pay Net Present Value (NPV) of forest — revenue goes to CAMPA |
| 2023 Amendment key change | Defined "forest" more narrowly — excludes land that does not appear in government records as forest |
Environment (Protection) Act, 1986 (EPA)
| Feature | Detail |
|---|---|
| Enacted | 1986 — umbrella legislation on environment |
| Trigger | Bhopal Gas Tragedy (December 1984) — Union Carbide MIC gas leak; ~15,000 deaths; largest industrial disaster |
| Scope | Empowers Central Government to take any measure to protect environment; set standards; regulate industries |
| Notifications under EPA | EIA Notification 2006, CRZ Notification 2019, Wetlands Rules 2017, Eco-Sensitive Zones (ESZ) — all notified under EPA |
| NEAA | National Environment Appellate Authority — appeals against EIA clearances |
Water (Prevention and Control of Pollution) Act, 1974
- Establishes Central Pollution Control Board (CPCB) and State Pollution Control Boards (SPCBs)
- Sets standards for water quality; prohibits discharge of pollutants beyond standards
- Industries must obtain Consent to Establish and Consent to Operate from SPCB
Air (Prevention and Control of Pollution) Act, 1981
- Extends CPCB and SPCB powers to air pollution control
- Designates Air Pollution Control Areas (all of India now designated)
- Industries must obtain SPCB consent; vehicular emission standards (Bharat Stage VI implemented 2020)
Biological Diversity Act, 2002 (BDA)
| Feature | Detail |
|---|---|
| Enacted | 2002 — India's response to Convention on Biological Diversity (CBD), 1992 |
| Three-tier structure | NBA (National Biodiversity Authority, Chennai) → SBBs (State Biodiversity Boards) → BMCs (Biodiversity Management Committees at local level) |
| ABS | Access and Benefit Sharing — traditional knowledge holders must share in benefits |
| PBR | People's Biodiversity Register — at Gram Panchayat level |
| Amendment 2023 | Decriminalised several provisions; eased access for Indian researchers; AYUSH medicinal plants |
Forest Rights Act, 2006 (Scheduled Tribes and Other Traditional Forest Dwellers Act)
| Feature | Detail |
|---|---|
| Enacted | 2006 — corrects "historical injustice" to tribal communities |
| Ministry | Ministry of Tribal Affairs |
| Rights granted | (1) Individual Forest Rights (IFR); (2) Community Forest Rights (CFR); (3) Community Forest Resource Rights (CFRR) |
| Beneficiaries | Scheduled Tribes + Other Traditional Forest Dwellers (OTFDs) who have lived in forests for 75+ years |
| Land ceiling | Maximum 4 ha per nuclear family |
| Pattas issued | ~2.2 million pattas issued by 2024; significant areas in Chhattisgarh, Odisha, Jharkhand, MP |
| Gram Sabha | Village assembly has authority to grant/verify rights — bottom-up process |
| Conservation | CFR rights allow communities to protect and manage community forests |
CAMPA — Compensatory Afforestation
| Feature | Detail |
|---|---|
| Act | Compensatory Afforestation Fund Act, 2016 |
| Purpose | Collect and disburse funds from industries that divert forest land |
| Structure | National CAMPA (MoEFCC) + State CAMPAs |
| Collection | Industries pay: (1) Cost of compensatory afforestation; (2) NPV of forest |
| Fund corpus | ~₹67,000+ crore accumulated by 2025 — often called "the largest unspent fund in India" |
| Criticism | Money collected but slow release to states; afforestation quality concerns |
Coastal Regulation Zone (CRZ) Notification, 2019
| Feature | Detail |
|---|---|
| Replaces | CRZ 1991 and its amendments |
| Regulates | Development within 500 m of High Tide Line (HTL) on coasts and 100 m on island coasts |
| CRZ categories | CRZ-I (ecologically sensitive — no development), CRZ-II (urban areas), CRZ-III (rural/agricultural), CRZ-IV (water area up to 12 NM) |
| Key relaxation (2019) | Allowed FSI in coastal areas; eased tourism; fisherfolk housing |
Environmental Impact Assessment (EIA)
Legal Basis
- EIA Notification 2006 (under EPA 1986) — the current operative framework
- Proposed EIA Notification 2020: Draft released; widespread public objection; not yet finalised as of April 2026
Two Categories of Projects
| Category | Type | Who Appraises |
|---|---|---|
| Category A | Large projects with national impact (thermal power >500 MW, mining >50 ha, airports, highways >100 km, large chemical industries) | MoEFCC — Expert Appraisal Committee (EAC) |
| Category B | Medium-sized; less impact | State Environment Impact Assessment Authority (SEIAA) |
EIA Process — 8 Steps
1. SCREENING → Does the project need EIA? (Category A = always; B = screening)
2. SCOPING → Identify key issues to study; TOR (Terms of Reference) set by regulator
3. BASELINE DATA COLLECTION → Environmental status: air, water, soil, ecology, social
4. IMPACT PREDICTION → Predict impacts of project on environment
5. MITIGATION PLAN → Environmental Management Plan (EMP) — how to reduce impacts
6. EIA REPORT (EIS) → Comprehensive document submitted to regulator
7. PUBLIC HEARING → Mandatory for most Category A and B projects; 30-day notice
8. APPRAISAL & DECISION → EAC/SEAC reviews; grant or reject Environmental Clearance (EC)
Post-Clearance Compliance
- Compliance monitoring: Half-yearly reports by project proponent
- Regional offices of MoEFCC: Inspect projects
- National Green Tribunal (NGT): Set up under NGT Act 2010; adjudicates environmental disputes; can suo motu act; has reviewed hundreds of EIA clearances
Regulatory Bodies
| Body | Established | Role |
|---|---|---|
| CPCB | 1974 (Water Act) | Central Pollution Control Board; sets national standards; oversees SPCBs |
| SPCBs | State-level | Issue consents; enforce pollution standards |
| MoEFCC | 1985 | Ministry of Environment, Forest and Climate Change; apex policy body |
| NTCA | 2006 | National Tiger Conservation Authority; Project Tiger oversight |
| NBA | 2003 | National Biodiversity Authority; ABS, PBR |
| CAMPA | 2016 | Compensatory Afforestation Fund; forest diversion |
| NGT | 2010 | National Green Tribunal; quasi-judicial; fast-track environmental disputes |
| GSI | 1851 | Geological Survey of India; geoscience data |
| FSI | 1981 | Forest Survey of India; biennial ISFR; satellite-based forest cover |
Pollution Geography of India
Air Pollution — India's Crisis
| Metric | Data |
|---|---|
| India's rank | 3rd most polluted country by population-weighted PM2.5 (IQAir 2024) |
| Most polluted cities (India, 2024 IQAir) | Byrnihat (Meghalaya), Delhi, Gurugram, Ghaziabad, Faridabad, Meerut, Muzaffurpur (Bihar) |
| Indo-Gangetic Plain (IGP) | World's most polluted airshed; geographical trapping by Himalayas + Aravalli gaps |
| Global rank (most polluted cities) | India has 13 of the world's 20 most polluted cities (IQAir 2024) |
Note: Byrnihat (on the Assam-Meghalaya border) was ranked the world's most polluted city in IQAir 2024 (PM2.5: 128.2 µg/m³ annual mean) — driven by cement and chemical industries in the area.
Why IGP is the worst airshed:
- Surrounded by Himalayas (north), Aravalli (west) — poor ventilation
- Dense vehicular traffic; coal power plants; industrial emissions
- Stubble burning in Punjab and Haryana (October–November): contributes ~30% of Delhi's PM2.5 spike in winter
- GRAP (Graded Response Action Plan): Delhi NCR — 4 stages of emergency action based on AQI
NCAP — National Clean Air Programme
| Feature | Detail |
|---|---|
| Launched | January 2019 |
| Target | 40% reduction in PM2.5 and PM10 concentration by 2026 (from 2017 baseline) |
| Coverage | 131 non-attainment cities — cities that consistently exceed NAAQS |
| Ministry | MoEFCC |
| Fund | ₹4,400 crore (2019-2024); extended for 2024-26 |
| Key actions | Source apportionment studies; mechanised sweeping; EV adoption; industrial compliance |
| Progress | Most cities show marginal improvement; some worsening — target likely to be missed |
NAAQS (National Ambient Air Quality Standards): Annual mean PM2.5 = 40 μg/m³ (India); WHO guideline = 5 μg/m³ — India's standard is 8× more permissive.
Industrial Pollution Hotspots
| Cluster | State | Primary Pollutant | Industry |
|---|---|---|---|
| Sukinda | Odisha | Hexavalent Chromium (Cr6+) | Chromite mining; world's largest Cr deposits |
| Vapi | Gujarat | Heavy metals; organics | Chemical/pharmaceutical GIDC cluster |
| Ankleshwar | Gujarat | Pharmaceuticals, dyes | GIDC industrial estate |
| Ludhiana | Punjab | Metal electroplating | Hosiery, metal, electroplating |
| Kanpur | UP | Chromium (leather tanneries) | Tanneries; BOD load on Ganga |
| Singrauli | MP/UP border | Fly ash, SO2 | Coal power plants (NTPC) |
| Jharia | Jharkhand | Coal dust, fire | Jharia coalfield — underground mine fires burning since 1916 |
CPCB — Grossly Polluted Industrial Clusters (GPICs)
- CPCB identifies GPICs — industrial areas with critical pollution levels
- 2024 list has 100+ clusters across India; subject to special monitoring and action plans
- Most critical: Vapi, Ankleshwar (Gujarat); Ludhiana (Punjab); Ghaziabad (UP)
River Pollution Geography
| River | Critical Stretch | Main Pollutant | Industry |
|---|---|---|---|
| Yamuna | Delhi (Wazirabad to Okhla) — 22 km = 76% of total pollution load | Sewage + industrial effluents | 22 km stretch receives Delhi's entire sewage volume |
| Ganga | Kanpur (chromium from tanneries); Varanasi (domestic); Patna (pharmaceutical) | BOD; chromium; coliform | Tanneries; urban untreated sewage |
| Damodar | Jharkhand-WB (coal belt) | Coal dust, mine drainage | DVC thermal plants; coal mines |
| Periyar | Kerala (Eloor) | Heavy metals; mercury | Fact Chemicals industrial belt |
| Beas | Punjab | Pesticide runoff | Agriculture (Green Revolution zone) |
| Chaliyar | Kerala | Sodium sulphite | Former Gwalior Rayons plant (Mavoor) |
Delhi's Yamuna crisis: The 22 km stretch from Wazirabad to Okhla (within Delhi) receives ~58% of Delhi's sewage (1,900 MLD vs STP capacity of ~900 MLD); Biological Oxygen Demand (BOD) exceeds 60 mg/l vs standard of 3 mg/l; ammonia 5–10× above standard.
Green Credit Programme (GCP) 2023
| Feature | Detail |
|---|---|
| Notified | October 2023 — Green Credit Programme Implementation Rules (under EPA 1986) |
| Ministry | MoEFCC |
| Concept | Market-based mechanism; entities that undertake green activities earn tradable Green Credits |
| Activities covered | Tree plantation on degraded land; water conservation; sustainable agriculture; mangrove restoration; eco-mark labelling; sustainable building and infrastructure; waste management |
| Administrator | Indian Council of Forestry Research and Education (ICFRE), Dehradun |
| Platform | Domestic Green Credit Market — credits listed and traded on designated exchange |
| Distinction from carbon credits | Green Credits focus on multiple environmental benefits (not just carbon); separate from Carbon Credit Trading Scheme (CCTS) under Energy Conservation Act |
Eco-Sensitive Zones (ESZ)
- Notified under EPA 1986 around Protected Areas (NPs, WLSs, Tiger Reserves)
- Minimum 1 km buffer around PA boundaries (can extend further)
- Activities prohibited in ESZ: Commercial mining, saw mills, setting up industries, construction of hotels/resorts, e-waste processing, polluting industries
- Activities regulated: Hotels, resorts, felling of trees, introduction of exotic species
- Supreme Court direction (2022): Every National Park/Wildlife Sanctuary must have an ESZ of minimum 1 km — pending implementation
Key Facts for UPSC
- Article 21: Right to clean environment (judicial expansion); Article 48A + 51A(g): Constitutional duty to protect environment (42nd Amendment, 1976)
- EPA 1986: Umbrella environment law; triggered by Bhopal Gas Tragedy (Dec 1984); all major notifications (EIA, CRZ, Wetlands) issued under it
- WPA 1972 + 2022 Amendment: Schedule I = highest protection; aligned with CITES Appendices
- Forest Conservation Act 1980: Renamed Van (Sanrakshan) Adhiniyam (2023); prior Central approval needed for forest diversion; 2023 amendment controversially narrowed definition of "forest"
- BDA 2002: NBA (Chennai), SBBs, BMCs; Access and Benefit Sharing (ABS); People's Biodiversity Register (PBR)
- FRA 2006: Forest Rights Act; ST + OTFD rights; max 4 ha; Gram Sabha verifies; ~2.2 million pattas issued
- CAMPA 2016: Corpus >₹67,000 crore; slow utilisation; covers NPV + compensatory afforestation
- EIA Notification 2006: Category A (Central — EAC) and Category B (State — SEIAA/SEAC); 8-step process ending with Environmental Clearance; Public Hearing mandatory
- NGT (2010): National Green Tribunal Act; quasi-judicial; Principal Bench Delhi; regional benches at Bhopal, Chennai, Kolkata, Pune, Delhi
- NCAP 2019: 131 non-attainment cities; 40% PM2.5/PM10 reduction by 2026; ₹4,400 crore
- India's most polluted cities (2024): Byrnihat (Meghalaya) is most polluted; Delhi NCR belt dominates
- IGP airshed: World's most polluted; Himalayas + Aravalli create trapped air mass; stubble burning (Oct–Nov) worsens Delhi pollution
- Sukinda (Odisha): Hexavalent chromium pollution; India's most toxic industrial zone; world's largest chromite reserves
- Yamuna crisis: 22 km Delhi stretch = 76% of Yamuna's total BOD load; BOD 60 mg/l vs standard 3 mg/l
- Green Credit Programme (2023): Market-based; tradeable; administered by ICFRE; covers tree planting, water, mangroves, waste; distinct from CCTS carbon credits
- CPCB: Established 1974 (Water Act); Central standards body; oversees 35+ SPCBs
- Jharia coalfields: Underground coal fires burning since 1916 — chronic air pollution in Dhanbad district, Jharkhand
- Eco-Sensitive Zones: Notified under EPA; minimum 1 km around PAs per SC 2022 direction; prohibit mining, industry, hotels
Article 48A (DPSP) and Article 51A(g) (Fundamental Duty) — both directing the State and citizens to protect the environment — were inserted by the 42nd Constitutional Amendment (1976) following the Stockholm Conference on Environment (1972).
The Environment (Protection) Act 1986 is India's umbrella environment legislation, enacted in the aftermath of the Bhopal Gas Tragedy (December 1984). All major environment notifications — EIA 2006, CRZ 2019, Wetlands Rules 2017, and Eco-Sensitive Zone declarations — are issued under this Act.
The Forest (Conservation) Act 1980 requires prior Central Government approval for any diversion of forest land for non-forest purposes. The 2023 amendment renamed it Van (Sanrakshan Evam Samvardhan) Adhiniyam and controversially narrowed the definition of 'forest' — excluding land near international borders for strategic infrastructure.
The Forest Rights Act 2006 (Scheduled Tribes and Other Traditional Forest Dwellers Act) corrects the 'historical injustice' to tribal communities by granting individual forest rights (max 4 ha per family) and community forest rights. The Gram Sabha verifies and grants rights. About 2.2 million pattas have been issued by 2024.
The EIA Notification 2006 (under EPA 1986) classifies projects into Category A (appraised by MoEFCC's Expert Appraisal Committee) and Category B (appraised by State EIA Authority — SEIAA). The 8-step EIA process ends with an Environmental Clearance (EC), and a mandatory Public Hearing applies to most Category A and B projects.
The National Green Tribunal (NGT), established under the NGT Act 2010, is a quasi-judicial body that fast-tracks environmental dispute resolution. Its Principal Bench is in Delhi, with regional benches at Bhopal, Chennai, Kolkata, and Pune.
CAMPA (Compensatory Afforestation Fund Act 2016) collects funds from industries that divert forest land — covering both compensatory afforestation costs and Net Present Value (NPV) of the forest. The corpus exceeded ₹67,000 crore by 2025, but utilisation by states has been slow.
The Biological Diversity Act 2002 implements the CBD in India through a three-tier structure: National Biodiversity Authority (NBA, Chennai) → State Biodiversity Boards (SBBs) → Biodiversity Management Committees (BMCs) at the local level. The 2023 amendment eased access for Indian AYUSH researchers and decriminalised minor violations.
The National Clean Air Programme (NCAP), launched in January 2019, targets a 40% reduction in PM2.5 and PM10 concentrations by 2026 (from a 2017 baseline) in 131 non-attainment cities, with a budget of ₹4,400 crore.
India has 12 of the world's 20 most polluted cities (IQAir World Air Quality Report 2024). Byrnihat (on the Assam-Meghalaya border) was ranked the world's most polluted city in 2024 (annual mean PM2.5: 128.2 µg/m³), driven by cement and chemical industries.
The Indo-Gangetic Plain (IGP) is the world's most polluted airshed. It is geographically trapped by the Himalayas to the north and Aravalli gaps. Winter stubble burning in Punjab and Haryana contributes ~30% of Delhi's PM2.5 spike in October–November.
Sukinda (Odisha) is India's most toxic industrial zone — it has the world's largest chromite deposits and severe hexavalent chromium (Cr6+) pollution from mining. India's National Ambient Air Quality Standard for annual mean PM2.5 is 40 µg/m³ — 8× more permissive than WHO's guideline of 5 µg/m³.
The 22 km stretch of the Yamuna River in Delhi (Wazirabad to Okhla) accounts for 76% of the river's total BOD pollution load. BOD exceeds 60 mg/l against the standard of 3 mg/l, because the stretch receives ~1,900 MLD of sewage against an STP capacity of ~900 MLD.
The Green Credit Programme (GCP), notified in October 2023 under EPA 1986, is a market-based mechanism where entities earn tradeable 'Green Credits' for activities like tree plantation, water conservation, and mangrove restoration. It is administered by ICFRE (Dehradun) and is distinct from the Carbon Credit Trading Scheme (CCTS).
Eco-Sensitive Zones (ESZ) are declared under EPA 1986 as buffer zones around Protected Areas. The Supreme Court directed in 2022 that every National Park and Wildlife Sanctuary must have a minimum 1 km ESZ. Mining, saw mills, and polluting industries are prohibited within ESZs.
The CRZ (Coastal Regulation Zone) Notification 2019 replaced CRZ 1991. It regulates development within 500 m of the High Tide Line on mainland coasts (100 m on island coasts) and categorises coastal areas into CRZ-I (ecologically sensitive — no development) through CRZ-IV.
The Central Pollution Control Board (CPCB) was established under the Water (Prevention and Control of Pollution) Act 1974. Industries must obtain 'Consent to Establish' and 'Consent to Operate' from State Pollution Control Boards (SPCBs). CPCB has identified 100+ Grossly Polluted Industrial Clusters (GPICs) as of 2024.
Related Chapters
Biodiversity and Protected Areas of India
India's biodiversity — 4 hotspots (Western Ghats, Eastern Himalayas), 22 protected area categories, Project Tiger (3,167 tigers), Project Elephant, 18 Biosphere Reserves, wildlife corridors, endangered species, invasive plants, WPA 1972, and Kunming-Montreal GBF 30×30 target.
Natural Vegetation of India
India's five forest types, vegetation zones by rainfall/altitude, biodiversity hotspots, Biosphere Reserves, and conservation framework.
Climate Change and India's Changing Geography
India State of Forest Report (ISFR) 2023
Key findings of ISFR 2023 (18th edition): forest cover, tree cover, mangroves, carbon stock, bamboo, and state-wise changes vs global GFRA 2025 data.