J. Environment
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| Case | Year | Holding |
|---|---|---|
| M.C. Mehta v. Union of India (Oleum Gas Leak case) | 1987 | Following a hazardous gas leak from a Delhi factory, evolved the doctrine of Absolute Liability for enterprises engaged in inherently dangerous activities — stricter than the English "strict liability" rule in Rylands v. Fletcher, admitting no exceptions. |
| M.C. Mehta v. Union of India (Ganga Pollution case) | 1988 | Ordered closure of polluting Kanpur tanneries discharging untreated effluent into the Ganga — early PIL combined with "polluter pays" reasoning rooted in Art. 21. |
| Indian Council for Enviro-Legal Action v. Union of India (Bichhri case) | 1996 | Held polluting industries are liable to remediate environmental damage they cause and to compensate affected villagers — a concrete application of the polluter-pays principle with a remediation order, not just a fine. |
| Vellore Citizens' Welfare Forum v. Union of India | 1996 | Formally incorporated the Precautionary Principle and the Polluter Pays Principle into Indian environmental law as part of sustainable development. |
| M.C. Mehta v. Union of India (Taj Trapezium case) | 1996–97 | Ordered industries near the Taj Mahal to switch to natural gas or relocate, to halt pollution-driven decay of the monument's marble. |
| T.N. Godavarman Thirumulpad v. Union of India | 1996 onward | A single, still-continuing PIL that vastly expanded the legal definition of "forest" (beyond notified reserve forests, to any land that is a forest by dictionary meaning) and set up ongoing Court-monitored regulation of forest use — a textbook example of "continuing mandamus." |
| M.C. Mehta v. Union of India (Vehicular Pollution/CNG case) | 1998 onward | Directed Delhi's public transport fleet to convert to CNG to cut vehicular pollution — another landmark "continuing mandamus," where the Court kept supervising compliance over years rather than issuing one final order. |
Notes. Note that "M.C. Mehta v. Union of India" is not one case but a label for a whole series of separate PILs filed by the same environmental lawyer across different issues (Oleum gas, Ganga, Taj Trapezium, vehicular pollution) — exams routinely test whether you can match the correct sub-topic to the correct M.C. Mehta case.
Mnemonic. "Oleum gassed the Ganga, a Bichhri Village sued while the Taj's Guardian forest Choked on fumes" — Oleum Gas Leak (1987) → Ganga Pollution (1988) → Bichhri (1996) → Vellore Citizens (1996) → Taj Trapezium (1996–97) → Godavarman (1996 onward) → Vehicular/CNG (1998 onward). Picture one long toxic timeline running from a gas leak, through a polluted river and village, to a marble monument choking, to a forest finally cleaned up by a permanent court order.
Practice Recall. Before reading on: "M.C. Mehta v. Union of India" names at least four different judgments — list the four sub-topics and roughly match each to its year.
Answer: Oleum Gas Leak (1987, Absolute Liability) · Ganga Pollution (1988, Kanpur tanneries) · Taj Trapezium (1996–97, natural gas/relocation near the Taj) · Vehicular Pollution/CNG (1998 onward, Delhi's bus fleet). (Bichhri, Vellore Citizens, and Godavarman are separate petitioners, not M.C. Mehta cases, even though they sit in the same era and theme.)