The judicial push for environmental CSR

What Happened

In a landmark judgment delivered on December 19, 2025, the Supreme Court of India held that Corporate Social Responsibility (CSR) under the Companies Act, 2013 inherently and mandatorily includes Corporate Environmental Responsibility — companies can no longer treat environmental spending as an optional item in their CSR menu.
The ruling came in the case M.K. Ranjitsinh & Ors. v. Union of India & Ors. (2025 INSC 1472), a PIL originally filed in 2019 by environmentalist M.K. Ranjitsinh focusing on the imminent extinction threat to the Great Indian Bustard (GIB) from power transmission lines and industrial infrastructure in Rajasthan and Gujarat.
The bench of Justices Pamidighantam Sri Narasimha and Atul S. Chandurkar grounded the ruling in Article 51A(g) of the Constitution — the fundamental duty of every citizen (and by extension, corporations as legal persons) "to protect and improve the natural environment including forests, lakes, rivers and wildlife."
The court held that where corporate activities — mining, power generation, infrastructure development — threaten the habitat of endangered species, the Polluter Pays principle obliges the company to bear costs of species recovery, not merely pay fines.
A meaningful portion of the mandatory 2% CSR spend must be allocated to environmental protection, conservation of endangered species, and ecological restoration, the court directed.
The ruling has broad implications for companies across sectors: power utilities operating in GIB habitat zones, mining companies in ecologically sensitive areas, and infrastructure firms near tiger reserves or wetlands may now be directed to fund conservation directly.

Static Topic Bridges

Companies Act, 2013 — Section 135 and the CSR Mandate

Section 135 of the Companies Act, 2013 mandates that companies meeting specified financial thresholds must constitute a CSR Committee and spend at least 2% of their average net profits from the preceding three financial years on CSR activities. Before this judgment, Schedule VII of the Companies Act listed qualifying CSR activities broadly — environmental sustainability was one among many options.

Companies covered: Those with net worth ≥ ₹500 crore, or turnover ≥ ₹1,000 crore, or net profit ≥ ₹5 crore in any financial year.
Before the 2025 SC ruling, CSR spending on environmental activities was discretionary — companies typically spent the 2% on healthcare, education, rural development, or skill training, treating environment as low priority.
The 2021 amendment to Section 135 introduced the concept of "unspent CSR amount" — companies must now either spend the unspent amount within three years or transfer it to a Central government fund (PM's National Relief Fund or a Schedule VII fund).
The Companies (CSR Policy) Rules, 2014 specify implementation modalities: companies can implement CSR through registered entities (NGOs, Section 8 companies), self-execution, or government bodies.
The SC ruling now effectively elevates environmental protection to a near-mandatory component within the 2% CSR allocation, particularly for companies whose operations cause ecological harm.

Connection to this news: The judicial reinterpretation of Section 135 transforms what was a compliance checkbox into a substantive environmental obligation, with the Supreme Court acting as the enforcer where legislative intent was inadequate.

Great Indian Bustard (GIB) — Conservation Status and Threats

The Great Indian Bustard (Ardeotis nigriceps) is one of the heaviest flying birds in the world and is India's most critically endangered bird. It is the state bird of Rajasthan. The species once ranged across 11 Indian states but now survives only in small pockets of Rajasthan and Gujarat.

IUCN Red List status: Critically Endangered.
Current estimated wild population: Fewer than 150 individuals, down from over 1,260 in the 1970s.
Primary habitat: Arid and semi-arid grasslands of Rajasthan (Desert National Park, Pokhran area) and Gujarat (Kutch grasslands).
Key threat: High-tension power transmission lines crossing GIB habitat; the birds, which have limited frontal vision, collide with overhead wires and die. The SC had earlier ordered underground power cables in Priority I GIB areas (2021 order), but this was contested on technical and cost grounds.
Other threats: Habitat conversion for agriculture and solar/wind farms, hunting, and disturbance from infrastructure construction.
Protected area: The Desert National Park (DNP) in Jaisalmer, Rajasthan (3,162 sq km) — one of the largest protected areas in India — is the core GIB conservation zone.
The Species Recovery Plan for GIB includes a captive breeding programme at the Conservation Breeding Centre, Sam (Jaisalmer) under the Wildlife Institute of India (WII).

Connection to this news: The GIB case is the factual trigger for the CSR-environment ruling; it illustrates how a single species' extinction crisis can generate legal doctrine with economy-wide implications for corporate environmental accountability.

Constitutional and Legal Pillars of Environmental Governance in India

India's environmental jurisprudence is built on a set of constitutional provisions, legislative mandates, and judicial doctrines that together form a framework for environmental protection.

Article 48A (Directive Principle): The State shall endeavour to protect and improve the environment and safeguard forests and wildlife — non-justiciable but judicially used to interpret other rights.
Article 51A(g) (Fundamental Duty): Every citizen's duty to protect and improve the natural environment; the SC in this ruling extended this duty to corporations as legal persons.
Article 21 (Right to Life): Courts have interpreted this to include the right to a healthy and clean environment (Subhash Kumar v. State of Bihar, 1991).
Polluter Pays Principle: Codified in India through Vellore Citizens' Welfare Forum v. Union of India (1996); the cost of environmental damage must be borne by the entity causing it.
Precautionary Principle: Also recognised in Vellore (1996); in the absence of scientific certainty, precautionary action must be taken.
Public Trust Doctrine: Air, water, sea, and forests are held in trust by the State for the public and cannot be appropriated for private use (M.C. Mehta v. Kamal Nath, 1997).

Connection to this news: The M.K. Ranjitsinh judgment adds a new layer to this architecture — corporate entities now have an explicit, court-enforced constitutional environmental duty, operationalised through the CSR mechanism.

Key Facts & Data

Case: M.K. Ranjitsinh & Ors. v. Union of India & Ors., 2025 INSC 1472; judgment dated December 19, 2025.
Bench: Justices Pamidighantam Sri Narasimha and Atul S. Chandurkar.
Companies Act 2013, Section 135: Mandates 2% of average 3-year net profit on CSR for qualifying companies (net worth ≥ ₹500 crore, or turnover ≥ ₹1,000 crore, or net profit ≥ ₹5 crore).
Constitutional grounding: Article 51A(g) — fundamental duty to protect natural environment; Article 48A — Directive Principle on environmental protection.
Great Indian Bustard: Critically Endangered (IUCN); fewer than 150 wild individuals; state bird of Rajasthan.
GIB primary protected area: Desert National Park, Jaisalmer, Rajasthan (~3,162 sq km).
Polluter Pays Principle: Recognised in Indian law since Vellore Citizens' Welfare Forum (1996).
Earlier GIB order: SC 2021 — directed underground power cables in GIB Priority I habitat areas.
Captive breeding: Conservation Breeding Centre at Sam, Jaisalmer (Wildlife Institute of India).
The ruling implies energy, mining, and infrastructure companies with operations near endangered species habitats must now fund species recovery through CSR.