Environmental impact assessment in India

Environmental impact assessment, or EIA, is the process of studying a proposed project's likely effects on air, water, land, biodiversity and people before it is approved, and of setting conditions to reduce harm. In India it rests on the Environment (Protection) Act of 1986, under which the EIA Notification of 2006 lists categories of projects, such as mines, dams, ports, highways and large industries, that need prior environmental clearance from the central government or from state authorities, depending on their size and location.

The process has several stages. The project proponent prepares an EIA report, often through a consultant, describing the baseline environment, predicted impacts and a mitigation plan. For most large projects, a public consultation follows, where affected people can raise objections and ask questions at a public hearing. An expert appraisal committee then reviews the report and the consultation record and recommends whether clearance should be granted, refused, or granted with conditions. Clearance, when given, carries conditions on pollution control, afforestation, monitoring and compliance reporting.

Public consultation is the most contested stage. Critics argue that hearings are sometimes held far from affected villages, that reports are technical and not available in local languages, and that projects are presented as already decided. Supporters of the process argue that consultation has stopped or modified harmful projects and has forced disclosure of information that would otherwise stay private. A draft revision of the notification published in 2020 attracted extensive comment on these points, including proposals on post-facto clearance and on exemptions, and the draft's status should be checked at the time of reading.

Compliance after clearance is the weakest link. Conditions may require monitoring reports, but follow-up inspection is limited, and violations are often detected by local people or by the National Green Tribunal, set up under an Act of 2010 to hear environmental cases quickly. The Tribunal has become an important forum for challenging clearances and for ordering remediation, though its orders still depend on agencies for enforcement.

For civil studies, EIA is best understood as a decision procedure, not a scientific verdict. Its quality depends on baseline data, independence of consultants, genuine consultation, and follow-up. An answer that treats clearance as proof that a project is safe misses the point: clearance is a conditional permission, and its conditions are only as good as their monitoring.