Topic 28: EIA & Coal/Thermal Power Impacts
The "gatekeeper" chapter — how India screens projects for environmental damage, and why coal/thermal power is its biggest test case. Scoring core: the EIA process & stages, the EIA Notification 2006 (Category A vs B, EAC/SEIAA), public consultation, the impacts of coal mining & thermal power (fly ash, emissions, water), the FGD & fly-ash norms, and the debate around just transition and the controversial Draft EIA 2020. Built from process to the latest FGD-deadline and coal current affairs.
On this page
- 1.EIA — Concept & Importance
- 2.EIA Process & Stages
- 3.EIA Notification 2006 & Categories
- 4.Public Consultation & Bodies
- 5.Coal Mining Impacts
- 6.Thermal Power Plant Impacts
- 7.Fly Ash, FGD & Emission Norms
- 8.Clean Coal & Just Transition
- 9.Critiques & Draft EIA 2020
- 10.Current Affairs Link (2024–2026)
- 11.Prelims PYQ Practice
- 12.Mains PYQ Practice
- ★15-Minute Revision Box
Conceptual Clarity — Why this Topic Matters
EIA is where UPSC tests whether you understand India's project-clearance machinery and the environment-development trade-off. Three question patterns recur:
- Definitional / static: "what is EIA?", stages (screening, scoping, EMP), Category A vs B, which body clears what (EAC/MoEFCC vs SEIAA/SEAC). Pure recall — a stage/category table settles it.
- Statement-elimination (2–4 statements): matching stage↔authority↔document — e.g. public hearing is part of "public consultation", Category A cleared by the Centre, EMP = Environmental Management Plan. One wrong pairing sinks the option.
- Applied / current: Draft EIA 2020 controversy, FGD-installation deadlines for thermal plants, fly-ash utilisation, ex-post-facto clearance rulings, just-transition for coal districts. Mains GS-III links these to sustainable development & environmental democracy.
Highest-frequency themes: EIA stages · Notification 2006 categories · EAC/SEIAA · public consultation · coal & thermal impacts · fly ash & FGD · just transition · Draft EIA 2020.
1. EIA — Concept & Importance
Environmental Impact Assessment (EIA) is a formal study of the likely environmental effects of a proposed project before it is approved, so that harm can be predicted, prevented or minimised. It is the main tool integrating environment into development decisions.
1.1 Definition & Legal Basis
- What: a planning tool that predicts environmental, social & health impacts and proposes an Environmental Management Plan (EMP) to mitigate them.
- Legal basis: issued under the Environment (Protection) Act, 1986; first EIA Notification in 1994, replaced by the EIA Notification 2006.
- Principle: operationalises "prevention is better than cure" and the precautionary principle.
1.2 Why EIA Matters
| Function | Benefit | Example |
|---|---|---|
| Predict impacts | Anticipate damage early | Dam → submergence assessment |
| Mitigation (EMP) | Design safeguards | Green belt, effluent treatment |
| Public participation | Voice for affected people | Public hearing |
| Informed decision | Approve/reject/condition | EAC appraisal |
2. EIA Process & Stages
The EIA Notification 2006 lays down four core stages for obtaining Environmental Clearance (EC).
2.1 The Four Stages
| Stage | What happens | Output |
|---|---|---|
| 1. Screening | Decide if full EIA is needed (mainly for Category B) | B1 (needs EIA) or B2 (does not) |
| 2. Scoping | EAC/SEAC frames Terms of Reference (ToR) | ToR for the EIA study |
| 3. Public Consultation | Public hearing + written responses from stakeholders | Concerns incorporated |
| 4. Appraisal | Detailed scrutiny of EIA/EMP by expert committee | Recommendation to grant/reject EC |
2.2 Key Documents
- EIA Report: baseline data, impact prediction, alternatives.
- EMP (Environmental Management Plan): mitigation + monitoring measures — the operative core.
- Environmental Clearance (EC): the final approval with conditions; monitored post-project.
3. EIA Notification 2006 & Categories
The 2006 Notification decentralised clearances by splitting projects into Category A (Central) and Category B (State), based on size & potential impact.
3.1 Category A vs B
| Feature | Category A | Category B |
|---|---|---|
| Size/impact | Large, high-impact | Smaller |
| Cleared by | MoEFCC on advice of EAC | State (SEIAA) on advice of SEAC |
| EIA needed? | Always | Only B1 (after screening); B2 exempt |
| Example | Major mining, large thermal plants | Smaller units, some building projects |
3.2 Bodies
- EAC — Expert Appraisal Committee (Central, for Category A).
- SEIAA — State Environment Impact Assessment Authority (for Category B), advised by SEAC (State Expert Appraisal Committee).
- PARIVESH — single-window online portal for applying/tracking clearances.
4. Public Consultation & Bodies
Public consultation is the democratic heart of EIA — it gives affected people and stakeholders a voice before clearance.
4.1 Two Components
- Public Hearing: a physical meeting at/near the site, conducted by the State Pollution Control Board, for locally-affected persons.
- Written responses: concerns from other stakeholders having a plausible stake.
4.2 Exemptions & Limits
| Point | Detail |
|---|---|
| Not for B2 | Category B2 projects skip public consultation |
| Exempt sectors | Some (e.g. certain modernisation, defence) exempt |
| Criticism | Hearings sometimes tokenistic, poorly publicised |
4.3 The Institutional Chain
- MoEFCC → policy & Category-A clearances (via EAC).
- SPCB → conducts public hearings; monitors compliance.
- NGT → adjudicates disputes; can quash faulty clearances.
5. Coal Mining Impacts
Coal supplies the bulk of India's electricity but its extraction is among the most environmentally damaging activities — the biggest real-world test of EIA.
5.1 Environmental Impacts
| Impact | Detail |
|---|---|
| Land & forest loss | Open-cast mining strips forests (central India coalfields) |
| Water | Acid mine drainage, groundwater depletion, contamination |
| Air & dust | Coal dust, particulate; mine fires (Jharia) |
| Subsidence | Ground collapse over old workings |
| Displacement | Tribal & forest-community eviction |
5.2 Governance Tensions
- Forest & tribal rights: clearances clash with the Forest Rights Act & gram-sabha consent.
- Commercial coal mining: opened to private/auction — boosts output but raises impact concerns.
- "Go/No-go" & inviolate forests: debate over which coal blocks are too ecologically sensitive to mine.
6. Thermal Power Plant Impacts
Coal-based thermal plants are India's single largest source of industrial air pollution and a major water user.
6.1 Pollution Streams
| Stream | Pollutant | Effect |
|---|---|---|
| Air | SO₂, NOx, PM, mercury, CO₂ | Acid rain, respiratory disease, warming |
| Solid | Fly ash, bottom ash | Land use, heavy metals leaching |
| Water | Cooling-water intake & warm discharge | Thermal pollution, low dissolved O₂ |
6.2 Fly Ash — the Key Waste
- What: fine, light residue from burning pulverised coal, captured by ESPs.
- Hazard: contains heavy metals; ash-pond breaches cause slurry disasters.
- Use: cement, bricks, road embankments, mine-void filling — 100% utilisation is the policy goal.
7. Fly Ash, FGD & Emission Norms
India tightened thermal-plant pollution control through the 2015 emission standards and fly-ash rules — but slow compliance is a recurring theme.
7.1 Control Technologies
| Technology | Targets | How |
|---|---|---|
| ESP (electrostatic precipitator) | Particulate / fly ash | Charges & collects ash particles |
| FGD (Flue-Gas Desulphurisation) | SO₂ | Lime/limestone scrubbing of flue gas |
| Low-NOx burners / SCR | NOx | Combustion control / catalytic reduction |
| Ash ponds / dry disposal | Fly & bottom ash | Storage + utilisation |
7.2 Norms & Compliance
- 2015 emission standards: first-ever SO₂, NOx, PM & mercury limits for thermal plants; mandated FGD.
- Repeated deadline extensions: FGD installation deadlines pushed back several times (cost, capacity concerns) — a key criticism.
- Fly Ash Notification: 100% ash-utilisation target; penalties for shortfall.
- Categorisation: plants near cities/critically-polluted areas given priority timelines.
8. Clean Coal & Just Transition
As India targets net-zero-2070 while coal still dominates power, the challenge is to cut coal's footprint and protect coal-dependent workers & regions.
8.1 Cleaner-Coal Measures
- Supercritical & ultra-supercritical plants: higher efficiency, less coal & CO₂ per unit.
- Coal washing/beneficiation, biomass co-firing in boilers.
- Carbon Capture, Utilisation & Storage (CCUS): emerging, costly.
8.2 Just Transition
| Element | Detail |
|---|---|
| Meaning | Shift away from coal without leaving workers/regions behind |
| At stake | Coal jobs, district economies (e.g. Jharkhand, Chhattisgarh) |
| Tools | Reskilling, alternative livelihoods, mine-land reclamation, RE jobs |
| Global link | Just Energy Transition Partnerships (JETPs), climate finance |
9. Critiques & Draft EIA 2020
EIA is powerful in theory but widely criticised in practice; the Draft EIA Notification 2020 sparked major controversy.
9.1 Criticisms of the EIA Regime
- Poor-quality reports: EIA prepared by consultants paid by the proponent (conflict of interest).
- Weak public consultation: short notice, language barriers, tokenism.
- Ex-post-facto clearances: approving projects after they start — courts have held this illegal.
- Weak monitoring: conditions in EC often not enforced.
9.2 Draft EIA 2020 — Why Controversial
| Proposal | Concern |
|---|---|
| Post-facto clearance regularisation | Rewards violations |
| Reduced public-consultation notice | Weakens participation |
| More exempt categories (B2) | Less scrutiny |
| Only govt/proponent can report violations | Silences public whistle-blowing |
10. Current Affairs Link (2024–2026)
EIA reform and thermal-plant compliance are perennial in the news — court rulings, deadline extensions and clearance controversies. Verify the latest before the exam.
10.1 Recent Developments
| Development | Year | Exam relevance |
|---|---|---|
| FGD-installation deadline extensions check latest | 2024–26 | SO₂ norms, phased timelines by plant location |
| Fly-ash utilisation compliance check latest | 2024–26 | 100% target, penalties, ash-pond safety |
| PARIVESH 2.0 single-window portal | 2023–26 | Digital clearances, transparency vs speed |
| Supreme Court on ex-post-facto clearance | 2024–26 | Illegality of retrospective EC |
| Commercial coal-mine auctions | 2024–26 | Production push vs forest/tribal rights |
| Just-transition & JETP discussions | 2024–26 | Coal-district livelihoods, climate finance |
| Draft EIA 2020 status | ongoing | Dilution debate, environmental democracy |
10.2 Recurring Exam Hooks
- Legal parent of EIA? (Environment (Protection) Act 1986)
- Current EIA Notification year? (2006)
- Category A cleared by? (MoEFCC / EAC)
- FGD removes which pollutant? (SO₂)
- Device for particulate capture? (ESP)
- Online clearance portal? (PARIVESH)
- Fair coal phase-down concept? (just transition)
11. Prelims PYQs
Q: Environmental Impact Assessment (EIA) in India is issued under which parent legislation?
Ans: (c) — EIA notifications are issued under the Environment (Protection) Act 1986. First notification 1994; current 2006.
Q: Under the EIA Notification 2006, Category A projects are appraised and cleared by:
Ans: (b) — Category A (large/high-impact) is cleared centrally by MoEFCC via the Expert Appraisal Committee. Category B goes to SEIAA/SEAC.
Q: Which is the correct sequence of EIA stages?
Ans: (b) — Screening → Scoping (ToR) → Public consultation → Appraisal → EC.
Q: Flue-Gas Desulphurisation (FGD) in thermal power plants is used to control:
Ans: (b) — FGD scrubs SO₂ from flue gas (lime/limestone). Particulate is captured by ESPs; NOx by low-NOx burners/SCR.
Q: Consider the following about "public consultation" under EIA 2006: 1. It includes a public hearing conducted by the SPCB. 2. It is waived for Category B2 projects. 3. It also considers written responses from stakeholders. Which are correct?
Ans: (d) — All correct — public consultation = SPCB hearing + written responses, and is waived for Category B2.
Q: Fly ash generated by thermal power plants is best managed by:
Ans: (b) — The Fly Ash Notification targets 100% utilisation in construction (cement/bricks/roads) and mine-void filling.
Q: "Ex-post-facto environmental clearance" refers to:
Ans: (b) — Ex-post-facto EC regularises projects started without clearance — courts have held it contrary to the precautionary principle.
Q: The concept of "just transition" in the energy context primarily concerns:
Ans: (b) — Just transition = moving away from coal without harming coal-dependent workers/communities — reskilling, alternative livelihoods, climate finance (JETPs).
Likely: FGD-deadline extensions for thermal plants, PARIVESH 2.0 single-window, EIA category shuffles/exemptions, and Just Energy Transition Partnership (JETP) finance are hot hooks — expect control-technology-to-pollutant and stage-sequence items. check for latest update or data
12. Mains PYQs + Model Answers
Questions below are original, exam-style formulations built from real UPSC GS-III themes — paraphrased to be copyright-safe. Each framework = intro angle → structured body → way-forward, with examples to quote.
Q: "Environmental Impact Assessment is only as strong as its public consultation and enforcement." Critically examine India's EIA regime.
Model Answer Framework
- Introduction — define: EIA (EPA 1986, Notification 2006); stages & EMP.
- Strengths: anticipatory tool, public participation, expert appraisal, PARIVESH.
- Weaknesses:
- Proponent-paid EIA, weak hearings, ex-post-facto clearances, poor monitoring.
- Conclusion: independent EIA authors, robust hearings, digital transparency, strong compliance.
Q: Discuss the environmental impacts of coal-based thermal power and the measures to reduce them.
Model Answer Framework
- Introduction — context: coal ~70% of power; largest industrial polluter.
- Impacts: SO₂/NOx/PM/mercury/CO₂, fly ash, thermal water pollution, mining damage.
- Measures: 2015 norms + FGD, ESP, fly-ash utilisation, supercritical plants, RE substitution.
- Conclusion: enforce deadlines, 100% ash use, accelerate clean energy + just transition.
Q: "The Draft EIA Notification 2020 tilts the balance from environment to ease of doing business." Comment.
Model Answer Framework
- Introduction — proposals: post-facto clearance, shorter consultation, more exemptions, restricted violation reporting.
- Concerns: weakens environmental democracy & accountability.
- Counterview: streamlining, investment, digital efficiency.
- Conclusion: strengthen (not dilute) EIA with transparency & independent appraisal.
Q: Examine the concept of "just transition" for India's coal sector.
Model Answer Framework
- Introduction — meaning: fair phase-down of coal protecting workers & regions.
- Stakes: coal jobs, district economies, energy security.
- Tools: reskilling, alternative livelihoods, mine reclamation, RE jobs, JETPs.
- Conclusion: gradual, equity-based, funded by developed nations.
Q: "Fly ash is both a hazard and a resource." Discuss in the context of thermal-power waste management.
Model Answer Framework
- Introduction — hazard: heavy metals, ash-pond breaches, land & water contamination.
- Resource: cement, bricks, roads, mine-void filling — circular economy.
- Policy: Fly Ash Notification, 100% utilisation target, penalties.
- Conclusion: dry disposal, safe ponds, market for ash products, monitoring.
Q: Repeated deadline extensions for flue-gas desulphurisation reveal the tension between clean-air goals and power-tariff pressures. Critically examine India's thermal-emission compliance regime. check for latest update or data
15-Minute Revision Box
Must-Remember Facts — EIA & Coal-Power Impacts
- EIA: anticipatory study under EPA 1986; first 1994, current Notification 2006; EMP = core.
- Stages: Screening → Scoping (ToR) → Public Consultation → Appraisal → EC.
- Categories: A = Centre (MoEFCC/EAC); B = State (SEIAA/SEAC); only B1 needs EIA, B2 exempt.
- Public consultation: SPCB public hearing + written responses; waived for B2.
- Draft EIA 2020: post-facto clearance, diluted consultation — criticised as weakening.
- Portal: PARIVESH single-window; NGT adjudicates disputes.
- Coal mining: forest/water/air damage, subsidence, displacement, FRA conflict.
- Thermal impacts: SO₂, NOx, PM, mercury, CO₂; fly ash; thermal water pollution.
- Controls: FGD → SO₂; ESP → particulate; 2015 emission norms; Fly Ash Notification (100% use).
- Just transition: fair coal phase-down; reskilling, JETPs, climate finance.