5. Role of the Indian Judiciary in the Evolution of Environmental Jurisprudence

This is the 5th post in Environmental Law, Unit IV — the previous post covered how courts can be approached (writ jurisdiction, PIL, continuing mandamus); this post covers what the judiciary actually did with those tools — the substantive doctrines it built into Indian environmental law.

The Problem This Topic Solves

Having the power to be approached is not the same as having a body of law to apply once a court is approached. When environmental litigation began reaching the Supreme Court in the 1980s, Parliament had passed only a handful of pollution-specific statutes, Article 21 said nothing explicitly about the environment, and there was no settled Indian doctrine for handling scientific uncertainty, for deciding who should bear the cost of environmental damage, or for balancing a country's genuine development needs against conservation. Almost every substantive principle of Indian environmental law that a student now takes for granted — the right to a healthy environment, the precautionary principle, the polluter pays principle, sustainable development — exists because the judiciary built it case by case, largely without express statutory text to rely on.

From Article 21 to a Right to a Healthy Environment

The single most important judicial move was reading a right to a healthy, pollution-free environment into Article 21's guarantee of the right to life — since Article 21 is directly enforceable, unlike Articles 48A and 51A(g). In Subhash Kumar v. State of Bihar (1991), the Supreme Court held in clear terms that the right to life guaranteed by Article 21 includes the right to enjoyment of pollution-free water and air, and that a citizen may invoke Article 32 to have that pollution removed. The petition itself was ultimately dismissed on its facts, because the Court found it had been filed to settle a private dispute rather than in genuine public interest — but the constitutional principle it laid down survived and became the foundation on which almost every later environmental PIL was built.

The Precautionary Principle and the Polluter Pays Principle

By the mid-1990s, courts were confronting industries that could point to genuine scientific uncertainty about the exact extent of the harm they caused, while continuing to pollute in the meantime. Vellore Citizens' Welfare Forum v. Union of India (1996) held that both the precautionary principle and the polluter pays principle are part of Indian environmental law, even without any express statute enacting them, reading them into Articles 21, 47, 48A and 51A(g) together. The precautionary principle places the burden on the industry to show that its activity is environmentally safe, rather than on affected citizens to prove harm beyond doubt before relief is granted; the polluter pays principle makes the polluter, not the public exchequer, responsible for the cost of remedying environmental damage and compensating victims.

Sustainable Development — Reconciling Growth and Conservation

Not every environmental case is one where stopping the harmful activity outright is the obviously correct answer — sometimes a project has real developmental value, and the real judicial question is how to allow it while genuinely protecting those it displaces or affects. In Narmada Bachao Andolan v. Union of India (2000), a 2:1 majority of the Supreme Court permitted continued construction of the Sardar Sarovar Dam on the Narmada, holding that displacement caused by a project of genuine national importance could be justified provided rehabilitation and resettlement of the displaced was properly secured — applying sustainable development as a principle of reconciliation rather than outright prohibition. Justice Bharucha's dissent took the opposite view on the facts, holding that the scale of the project's environmental and human consequences meant relief should not be denied merely because construction had already progressed and delay had occurred — a reminder that "sustainable development" is a balancing standard applied differently by different judges on the same facts, not a mechanical formula with only one possible answer.

Continuing Mandamus — the Judiciary Taking On an Administrative Role

The previous post in this unit described how continuing mandamus works procedurally; its significance for the judiciary's role is that it represents courts moving well beyond deciding a single dispute and into what is, in substance, ongoing supervision of executive environmental administration — as in T.N. Godavarman Thirumulpad v. Union of India (this subject's Unit III Case-Law list), where the Supreme Court has issued well over a thousand orders on forest governance since 1996. This expansion has been praised as necessary judicial activism filling a genuine enforcement vacuum, and criticised by others as blurring the separation of powers between the judiciary and the executive — a debate that remains unresolved in Indian constitutional law, but does not change the fact that this technique has produced most of the durable, on-the-ground enforcement of forest and environmental protection that exists today.

How the judiciary built environmental jurisprudence, case by case: 1991 — Subhash Kumar v. State of Bihar (Article 21's right to life held to include the right to a pollution-free environment) → 1996 — Vellore Citizens' Welfare Forum v. Union of India (precautionary principle and polluter pays principle read into Indian law) → 1996 onwards — T.N. Godavarman Thirumulpad v. Union of India (continuing mandamus begins — sustained judicial supervision of forest governance) → 2000 — Narmada Bachao Andolan v. Union of India (sustainable development applied to balance development against displacement, 2:1).

• Subhash Kumar v. State of Bihar (1991) first held that Article 21's right to life includes the right to a pollution-free environment — the constitutional foundation for nearly all later environmental rights litigation.
• Vellore Citizens' Welfare Forum v. Union of India (1996) established the precautionary principle and the polluter pays principle as part of Indian law, reading them into Articles 21, 47, 48A and 51A(g) even without express legislation.
• Narmada Bachao Andolan v. Union of India (2000) applied sustainable development to permit a major dam project to continue, conditioned on rehabilitation — showing the judiciary balancing development against displacement rather than treating them as always mutually exclusive.

• These judge-made doctrines were later given express statutory recognition — Section 20 of the National Green Tribunal Act, 2010 directs the Tribunal to apply "the principles of sustainable development, the precautionary principle and the polluter pays principle" in every case, converting judicial doctrine into a binding statutory mandate.
• Subhash Kumar's petition was itself dismissed for lack of bona fide public interest — a useful reminder that a case can be a landmark for the legal principle it states even when the petitioner personally loses.
• Narmada Bachao Andolan was decided 2:1, not unanimously — a fact worth remembering, since exam answers that describe it as a unanimous judgment misstate the case.

A Practical Example

Suppose a proposed thermal power project has a documented but scientifically disputed risk of significantly increasing particulate pollution in a nearby town, and no conclusive study yet exists on the exact health impact. Applying the precautionary principle, a court reviewing the project's clearance would not wait for affected residents to first prove definite harm before granting relief — it would place the burden on the project proponent to demonstrate the activity is environmentally safe, and could condition or stay clearance until adequate safeguards are shown, applying the same reasoning the Supreme Court used in Vellore Citizens rather than requiring proof of harm beyond doubt.

Quick Revision Points

• Subhash Kumar v. State of Bihar (1991): Article 21 includes right to pollution-free environment (petition itself dismissed on facts).
• Vellore Citizens' Welfare Forum v. Union of India (1996): precautionary principle + polluter pays principle read into Indian law.
• Narmada Bachao Andolan v. Union of India (2000), 2:1: sustainable development used to balance dam construction against displacement.
• T.N. Godavarman (continuing mandamus since 1996): judiciary effectively supervising forest administration nationwide.
• Section 20, NGT Act, 2010 later codified sustainable development, precautionary principle and polluter pays principle into statute.