Environmental Impact Assessment (EIA) Mandate 

The Environmental Impact Assessment (EIA) is a preventive environmental management tool used to evaluate the likely environmental consequences of a proposed project before it is approved.

In India, EIA is legally mandated under the Environment (Protection) Act, 1986 and operationalized through EIA Notifications (1994, 2006, and amendments thereafter).

It ensures that development projects do not cause irreversible harm to the environment and are carried out in a sustainable and scientifically assessed manner.

1. Meaning of Environmental Impact Assessment

EIA is:

A systematic process to identify, predict, evaluate, and mitigate environmental impacts of proposed development projects before decision-making.

It covers impacts on:

• Air
• Water
• Soil
• Biodiversity
• Human health
• Climate

2. Legal Framework of EIA in India

(A) Constitutional Basis

• Article 21 – Right to life includes right to a clean environment
• Article 48A – Duty of State to protect environment
• Article 51A(g) – Fundamental duty of citizens to protect environment

(B) Statutory Basis

• Environment (Protection) Act, 1986
• EIA Notification, 2006 (major governing framework)
• Amendments in 2020 (controversial relaxation of clearance norms)

(C) Institutional Structure

• Ministry of Environment, Forest and Climate Change (MoEFCC)
• State Environment Impact Assessment Authorities (SEIAA)
• Expert Appraisal Committees (EAC)

3. Stages of EIA Process

1. Screening

• Determines whether EIA is required for a project

2. Scoping

• Identifies key environmental issues to study

3. Public Consultation

• Involves affected communities and stakeholders

4. Environmental Impact Study

• Scientific assessment of environmental effects

5. Appraisal

• Expert committee evaluates report

6. Clearance/Approval

• Government grants or rejects project approval

7. Monitoring

• Post-clearance compliance review

4. Objectives of EIA Mandate

• Prevent environmental degradation
• Promote sustainable development
• Ensure informed decision-making
• Protect biodiversity and ecological balance
• Involve public participation
• Reduce long-term environmental costs

5. Importance of EIA

• Acts as preventive environmental law tool
• Reduces litigation after project approval
• Ensures balance between development and ecology
• Strengthens constitutional environmental rights under Article 21

6. Landmark Case Laws on EIA and Environmental Clearance

1. M.C. Mehta v. Union of India (Oleum Gas Leak Case, 1986)

• One of the foundational environmental cases
• Supreme Court introduced absolute liability principle
• Held that industries must prevent environmental harm
• Strengthened idea of prior environmental safety assessment

2. T.N. Godavarman Thirumulpad v. Union of India (1997 onwards)

• Massive forest conservation case
• Court expanded definition of “forest”
• Required strict clearance for forest diversion projects
• Reinforced need for environmental clearance before project execution

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

• Landmark case on pollution control
• Supreme Court recognized precautionary principle and polluter pays principle
• Held that environmental clearance must be based on scientific assessment
• Directly strengthened EIA framework in India

4. Lafarge Umiam Mining Pvt. Ltd. v. Union of India (2011)

• Concerned limestone mining in Meghalaya
• Court emphasized strict environmental clearance process
• Held that EIA must balance development with ecology
• Validated role of Expert Appraisal Committees

5. Alembic Pharmaceuticals Ltd. v. Rohit Prajapati (2020)

• Issue: expansion without fresh environmental clearance
• Supreme Court ruled:
  • Even “minor expansions” may require EIA clearance
• Strengthened mandatory nature of EIA compliance
• Rejected dilution of environmental safeguards

6. Karnataka Industrial Areas Development Board v. C. Kenchappa (2006)

• Concerned industrial development vs environmental protection
• Court held:
  • Sustainable development is part of Article 21
  • Environmental clearance process must be strictly followed
• Reinforced importance of EIA in industrial planning

7. Narmada Bachao Andolan v. Union of India (2000)

• Sardar Sarovar Dam project
• Court upheld project but stressed environmental safeguards
• Emphasized proper assessment and mitigation measures
• Showed judicial balancing of development and environmental protection

7. Principles Emerging from Judicial Decisions

From case law evolution, the following principles govern EIA in India:

1. Precautionary Principle

• Prevent environmental damage before it occurs

2. Polluter Pays Principle

• Project developer bears environmental damage cost

3. Sustainable Development

• Development must not harm future generations

4. Public Trust Doctrine

• Natural resources belong to the public

5. Mandatory Environmental Clearance

• No project can bypass EIA requirements

8. Issues in EIA Implementation

• Weak public consultation process
• Manipulation of environmental reports
• Dilution through amendments (e.g., 2020 draft concerns)
• Poor post-clearance monitoring
• Conflict between development pressure and ecological protection

9. Judicial Trend

Indian judiciary strongly supports EIA as:

• A constitutional necessity under Article 21
• A tool for preventive environmental governance
• A mechanism ensuring scientific decision-making in development

Courts consistently hold that:

Environmental clearance is not a formality but a constitutional safeguard.

Conclusion

The Environmental Impact Assessment mandate in India is a crucial legal mechanism ensuring sustainable development. It integrates constitutional values, statutory law, and judicial principles to balance ecological protection with economic growth.

Through landmark judgments like Vellore Citizens Welfare Forum, Lafarge Mining, and Alembic Pharmaceuticals, the Supreme Court has firmly established that:

EIA is not optional—it is a mandatory constitutional and environmental safeguard.