1. Introduction

Environmental Impact Assessment (EIA) Law in India is a preventive environmental regulatory mechanism used to evaluate the likely environmental consequences of a proposed project before it is approved or started.

It is mainly governed by:

• Environment (Protection) Act, 1986
• EIA Notification, 2006 (and amendments)
• Related laws like:
  • Water Act, 1974
  • Air Act, 1981
  • Wildlife Protection Act, 1972

Objective of EIA Law:

• Prevent environmental damage before it occurs
• Ensure sustainable development
• Balance development vs environmental protection
• Ensure public participation and transparency

2. Key Features of EIA Enforcement

(A) Prior Environmental Clearance (EC)

No major project can start without approval from:

• MoEFCC (Central level)
• SEIAA (State level)

(B) Mandatory Environmental Study

Projects must prepare:

• Baseline environmental data
• Impact prediction reports
• Mitigation measures

(C) Public Hearing Requirement

Affected communities must be consulted before approval.

(D) Expert Appraisal Committee (EAC)

Technical body evaluates:

• Environmental risk
• Scientific validity of reports

(E) Judicial Review

Courts and National Green Tribunal (NGT) ensure:

• Compliance with EIA norms
• Prevention of illegal projects

3. Major Principles of EIA Law (Judicially Developed)

• Sustainable development
• Precautionary principle
• Polluter pays principle
• Public trust doctrine
• Intergenerational equity

4. Landmark Case Laws (At least 6)

1. Rural Litigation and Entitlement Kendra v. State of U.P. (1985 – Doon Valley Case)

Held:

• First major environmental case in India
• Supreme Court stopped illegal limestone mining in ecologically sensitive area
• Recognized environment protection under Article 21

Significance:

Foundation of environmental enforcement jurisprudence in India

2. Vellore Citizens Welfare Forum v. Union of India (1996)

Held:

• Introduced precautionary principle and polluter pays principle
• Tanneries causing pollution ordered to pay compensation
• Environmental protection is part of sustainable development

Significance:

Strengthened legal enforceability of environmental regulation

3. M.C. Mehta v. Union of India (Oleum Gas Leak Case, 1987)

Held:

• Introduced absolute liability principle
• Hazardous industries strictly liable for environmental harm
• Strengthened regulatory enforcement against industrial pollution

Significance:

Made EIA enforcement stricter for hazardous industries

4. Indian Council for Enviro-Legal Action v. Union of India (1996 – Bichhri Case)

Held:

• Industrial units causing toxic waste pollution held liable
• Courts ordered environmental restoration costs on polluters

Significance:

Established strict enforcement of environmental compensation

5. M.C. Mehta v. Union of India (Taj Trapezium Case, 1997)

Held:

• Polluting industries near Taj Mahal were closed/relocated
• Environmental protection of heritage sites prioritized over industry

Significance:

Strengthened environmental clearance restrictions in sensitive zones

6. Hanuman Laxman Aroskar v. Union of India (2019 – Mopa Airport Case)

Held:

• EIA cannot be a mere procedural formality
• Public participation must be meaningful
• Expert committees must apply independent mind

Significance:

Reinforced quality and transparency of EIA process

7. T.N. Godavarman Thirumulpad v. Union of India (Forest Case Series)

Held:

• Expanded definition of “forest”
• Required forest clearance + EIA clearance together
• Introduced cumulative environmental impact assessment

Significance:

Major expansion of environmental enforcement in forest areas

8. Subhash Kumar v. State of Bihar (1991)

Held:

• Right to clean water is part of Article 21
• Pollution affecting health violates fundamental rights

Significance:

Constitutional foundation for EIA enforcement

5. How Courts Enforce EIA Law

Courts and NGT ensure enforcement through:

• Cancelling illegal environmental clearances
• Ordering project stoppage
• Directing fresh EIA studies
• Imposing environmental compensation
• Monitoring compliance of conditions

6. Challenges in EIA Enforcement

• Weak public participation in some cases
• Post-facto approvals (illegal constructions regularized later)
• Inadequate scientific data in reports
• Political and economic pressure
• Delay in tribunal decisions

7. Conclusion

Environmental Impact Assessment law in India is a preventive environmental governance tool, but its effectiveness depends heavily on enforcement.

Indian judiciary has transformed EIA from a procedural requirement into a substantive environmental safeguard, ensuring:

• Sustainable development
• Accountability of industries
• Protection of fundamental rights under Article 21

Thus, EIA law enforcement in India is best described as a judicially strengthened environmental regulatory system.