Q. “The most significant achievement of modern law in India is the constitutionalization of environmental problems by the Supreme Court.” Discuss this statement with the help of relevant case laws.
Question from UPSC Mains 2022 GS2 Paper
Model Answer:
The Supreme Court (SC) pioneered “green constitutionalism” in India by elevating environmental protection from mere statutory regulations to fundamental constitutional rights.
1. Mechanisms of Constitutionalization
- Expanding Article 21: Broadened the ‘Right to Life’ to explicitly include the right to a wholesome and clean environment.
- Harmonious Construction: Integrated Directive Principles (Article 48A) and Fundamental Duties (Article 51A(g)) into judicially enforceable constitutional mandates.
- Procedural Innovation: Diluted locus standi through Public Interest Litigation (PILs) under Article 32, democratizing environmental justice.

2. Landmark Case Laws & Evolved Principles
- Right to Clean Air/Water: Recognized fundamental right to pollution-free water and air (Subhash Kumar v. State of Bihar, 1991).
- Absolute Liability Principle: Established strict enterprise accountability for hazardous industries without exception (M.C. Mehta v. Union of India, Oleum Gas Leak).
- Precautionary & Polluter Pays: Embedded international ecological norms directly into domestic constitutional law (Vellore Citizens Welfare Forum, 1996).
- Public Trust Doctrine: Declared the State as a trustee holding natural resources for public use (M.C. Mehta v. Kamal Nath, 1997).
- Continuing Mandamus: Enabled ongoing judicial monitoring of national forest canopies (T.N. Godavarman Case).
By interweaving ecological protection into the constitutional fabric, the Supreme Court not only secured intergenerational equity but also laid the foundational jurisprudence for specialized bodies like the National Green Tribunal.




