Environmental Law

A.P. Pollution Control Board v. Prof. M.V. Nayudu

(1999) 2 SCC 718

Facts

An industry proposed to manufacture vegetable oils near the Himayat Sagar and Osman Sagar reservoirs in Andhra Pradesh.
These reservoirs supplied drinking water to Hyderabad and Secunderabad.
The Pollution Control Board refused consent because the unit was located within a protected zone and posed a risk to the water source.
The statutory appellate authority reversed the refusal.
It relied upon proposed treatment measures and concluded that pollution could be controlled.
Environmental experts and concerned parties argued that even a low-probability contamination event could seriously affect the drinking-water supply of a large population.
The dispute reached the Supreme Court.

How courts should decide environmental cases involving scientific uncertainty.
Who bears the burden of proving environmental safety.
Whether proposed safeguards justified permitting an industry near vital drinking-water reservoirs.
Whether ordinary courts and appellate authorities possessed adequate scientific expertise.

The precautionary principle applies where there is a risk of serious or irreversible environmental damage.
Lack of complete scientific certainty is not a reason to postpone protection.
The burden may fall upon the developer to demonstrate that the proposed activity is environmentally safe.
Drinking-water sources receive a particularly high degree of protection.
Environmental adjudication requires access to independent scientific expertise.
Administrative bodies must not prefer uncertain industrial assurances over essential public resources.

The Court explained that environmental science often cannot provide absolute answers.
Experts may disagree because:
data are incomplete;
ecosystems are complex;
long-term consequences are uncertain.
Traditional legal reasoning normally asks the claimant to prove harm.
In environmental cases, waiting for conclusive proof may mean waiting until the damage is irreversible.
The precautionary principle therefore shifts the focus:
the developer must show reasonable environmental safety;
the community need not first suffer contamination.
The proposed industry was located near reservoirs serving millions of people.
Even if treatment technology usually worked, failure or accidental discharge could affect a fundamental public necessity.
The appellate authority had accepted technical claims without sufficiently independent evaluation.
The Court found this approach inadequate.
It also discussed the limitations of judges and ordinary administrative officers in resolving highly technical disputes.
Environmental courts and tribunals should include or have access to specialists capable of evaluating:
hydrology;
toxicology;
chemistry;
ecology.
The case thus connected substantive precaution with institutional design.

The Supreme Court favoured protection of the drinking-water reservoirs and did not permit industrial approval to rest upon uncertain assurances.
It emphasised that the developer bears the burden of demonstrating environmental safety where serious risk exists.
The Court recommended specialist environmental courts or appellate bodies with scientific expertise.
The judgment became a leading authority on:
scientific uncertainty;
reverse burden of proof;
precautionary adjudication;
expert environmental institutions.
Use this case for: precaution where expert uncertainty surrounds a threat to an essential drinking-water source.