Public Trust Doctrine

The public trust doctrine treats certain natural resources as assets held by the state for the public rather than as property that government may freely dispose of. The state acts as a trustee, while the public, including future generations, is the beneficiary of resources essential to ecological and community life.

Core obligations of the state

The doctrine converts governmental control over natural resources into a duty to manage them for public benefit.

• The state must protect and conserve resources such as forests, rivers, water bodies, seashores and air against degradation or depletion.
• It must maintain resources for public use and enjoyment, subject to legitimate regulation and ecological limits.
• It cannot alienate or convert a trust resource for private use when this would substantially impair its ecological character or public utility.
• Any permission for private or commercial use must serve a genuine public interest and remain consistent with the state's continuing trusteeship.

Constitutional and judicial basis

Indian courts connect the doctrine with the environmental dimensions of Article 21, the state's duty under Article 48A, and the common-good principle in Article 39(b).

• In M.C. Mehta v. Kamal Nath (1997), the Supreme Court declared the public trust doctrine part of Indian law and held that the state has a legal duty to protect resources meant for public use.
• The doctrine restricts arbitrary governmental action because the state possesses natural resources in a fiduciary capacity, not as an unrestricted owner.

Governance consequences

Trusteeship requires the state to take affirmative protective action rather than merely refrain from damaging resources.

• Resource allocation and diversion must be fair, transparent and reasoned, with public and environmental interests receiving due consideration.
• The state must prevent encroachment, pollution and misuse, enforce environmental safeguards, and seek restoration where trust resources are unlawfully damaged.
• Courts may review state decisions and invalidate permissions or transfers that amount to an abdication of the trust obligation.