What role do environmental NGOs and activists play in influencing Environmental Impact Assessment (EIA) outcomes for major projects in India? Cite four examples with all important details.

Shows how longer clearance validity shrinks the points at which activists and communities can contest port projects.

• Ports, harbours and dredging projects now get environmental clearance for 20 years plus two five-year extensions, up from 10 years plus one.
• Critics note the expert committees' deliberations were not made public, and the change comes as India builds mega-ports such as Vizhinjam, Vadhavan and Great Nicobar.
• Warn that fishing communities lose a chance to raise concerns at fresh hearings.

The M.K. Ranjitsinh litigation shows a petition reshaping where transmission lines and renewable projects can be built, a strong example of outside pressure changing project outcomes.

• In M.K. Ranjitsinh v Union of India, the Supreme Court in April 2021 restricted overhead transmission lines across about 99,000 sq km and ordered undergrounding where feasible.
• In March 2024 the Court found no basis for a blanket ban, since renewable energy also serves the environment, and set up an expert committee.
• Its 19 December 2025 judgment fixed priority areas of 14,013 sq km (Rajasthan) and 740 sq km (Gujarat), ordered critical lines buried or rerouted within two years and barred new wind turbines there.

Use the post facto clearance litigation as an example of how court challenges, not only appraisal committees, have decided what EIA permits for projects built without prior clearance.

• Vanashakti v Union of India (29 July 2026): the Supreme Court upheld the 2017 one-time window, quashed the 2021 Office Memorandum and held prior clearance mandatory unless rules are formally amended.
• Alembic Pharmaceuticals v Rohit Prajapati (2020): the Court called ex post facto clearances contrary to the precautionary principle and set aside a 2002 circular allowing them.
• Show that litigation cuts both ways: the May 2025 ruling striking down the post facto mechanism was recalled on review, in proceedings including a petition by the real estate body CREDAI.