3. Liability of Multinational Corporations and Companies | When the Polluter Is a Private Company, Not a State

This is the 3rd post in Environmental Law, Unit V — the previous two posts dealt with State-to-State responsibility; this post turns to a different and increasingly common problem: environmental harm caused not by a government, but by a multinational corporation operating across borders through local subsidiaries.

The Problem This Topic Solves

The State responsibility framework in the previous post assumes the wrongdoer, in the end, is a State that can be sued diplomatically or arbitrated against by another State. But an enormous amount of real-world transboundary and cross-border environmental harm is caused by private multinational corporations (MNCs) — companies incorporated in one country (the "home State") that operate hazardous facilities in another country (the "host State") through a locally incorporated subsidiary. International law, in its classical form, binds States, not private companies; a victim harmed by an MNC's activity generally cannot sue that MNC before an international tribunal the way one State can arbitrate against another. This creates a structural gap: the local subsidiary that actually ran the hazardous facility may have limited assets and be judgment-proof, while the wealthy parent company that owned, funded, and set safety policy for it sits in another country, often shielded by the ordinary company-law principle that a parent is not automatically liable for its subsidiary's debts and wrongs. This topic examines how this gap has been addressed — and how much of it still remains open.

Why the Corporate Structure Itself Is Part of the Problem

Bhopal exposed a structural feature of company law that makes multinational liability difficult: the doctrine of separate corporate personality, under which a parent company and its subsidiary are treated as two entirely distinct legal persons, each responsible only for its own debts and wrongs, even where the parent owns a controlling shareholding and sets policy. This doctrine exists for legitimate commercial reasons — it lets investors limit their risk to what they invest in a company — but it also means that a wealthy parent can, in principle, insulate itself from liability for a disaster caused by a thinly capitalised subsidiary in another country, so long as the parent is not shown to have directly controlled the specific operational decision that caused the harm. Victims of Bhopal, and of many later industrial disasters involving multinational operations, have consistently argued that this doctrine should not be allowed to defeat legitimate environmental and human-rights claims where the parent in fact exercised real control over the subsidiary's safety and environmental practices.

The International Soft-Law Response

Because there is still no single binding international treaty imposing direct environmental or human-rights liability on multinational corporations, the international community has responded mainly through non-binding "soft law" instruments. The most significant is the United Nations Guiding Principles on Business and Human Rights (2011), often called the "Ruggie Principles" after their author John Ruggie, which rest on a three-part framework: the State's duty to protect against human rights and environmental abuses by companies operating in its territory; the corporation's own responsibility to respect human rights and the environment throughout its operations, wherever in the world they take place; and the need for access to an effective remedy for victims, whether judicial or non-judicial. The OECD Guidelines for Multinational Enterprises, first adopted in 1976 and periodically updated, similarly set voluntary standards for MNC conduct, including on the environment, and provide "National Contact Points" in each adhering country where complaints can be raised — though compliance remains voluntary and non-binding. Since 2014, an open-ended Intergovernmental Working Group at the UN Human Rights Council has been negotiating a binding treaty on business and human rights, but as of now it remains in draft form and has not been concluded or widely ratified.

A More Recent Trend — Suing the Parent Company at Home

Since roughly the last decade, courts in some home States have shown greater willingness to hear claims brought by foreign victims directly against a parent company, based on the parent's own alleged failure of care in setting group-wide environmental and safety policy, rather than trying to pierce the corporate veil entirely. In Vedanta Resources plc v. Lungowe (2019), the UK Supreme Court allowed Zambian villagers to sue a UK-incorporated parent company in English courts over pollution allegedly caused by its Zambian copper-mining subsidiary, holding that a parent company can owe a direct duty of care to those affected by a subsidiary's operations if it exercised sufficient control over, or gave sufficient guidance on, the relevant activity. In Okpabi v. Royal Dutch Shell plc (2021), the same court allowed Nigerian claimants from the Niger Delta to proceed with a similar claim against Shell's UK-based parent over oil spills caused by its Nigerian subsidiary. Neither case has yet finally decided that the parent companies are liable — both were only decisions allowing the claims to proceed to trial — but together they mark a significant shift toward treating a genuinely controlling parent as answerable in its own home courts for environmental harm its foreign subsidiaries cause, narrowing (without eliminating) the structural gap Bhopal first exposed.

How the MNC liability gap has been addressed over time: 1984 — the Bhopal Gas Tragedy exposes the parent-subsidiary liability gap when MIC gas leaks from UCIL's Bhopal plant → 1985–89 — the US suit against parent company UCC is dismissed on forum non conveniens, the case is routed back to India, Parliament enacts the Bhopal Gas Leak Disaster (Processing of Claims) Act, 1985, and a US $470 million settlement follows → 2011 — the UN Guiding Principles on Business and Human Rights (the "Ruggie Principles") set out a soft-law framework only → 2014 — negotiations begin at the UN Human Rights Council on a binding treaty on business and human rights, still in draft form today → 2019/2021 — in Vedanta Resources plc v. Lungowe and Okpabi v. Royal Dutch Shell plc, UK courts allow direct parent-company duty-of-care claims to proceed in the parent's own home courts.

• International law classically binds States, not private companies — creating a structural gap where a foreign victim cannot directly sue a multinational parent company before an international tribunal.
• The Bhopal Gas Tragedy (1984) is the defining example: victims' attempt to sue the US parent, Union Carbide Corporation, in US courts was dismissed on forum non conveniens grounds, sending the case back to India, where a US $470 million settlement was reached under the Bhopal Gas Leak Disaster (Processing of Claims) Act, 1985.
• The doctrine of separate corporate personality — treating a parent and its subsidiary as distinct legal persons — is a central obstacle to holding a wealthy parent responsible for a subsidiary's environmental harm.

• There is still no binding international treaty imposing direct environmental liability on multinational corporations; the response so far has been through non-binding soft law — the UN Guiding Principles on Business and Human Rights, 2011 ("Ruggie Principles") and the OECD Guidelines for Multinational Enterprises.
• A binding UN treaty on business and human rights has been under negotiation since 2014 but remains unconcluded.
• Recent UK Supreme Court decisions — Vedanta Resources plc v. Lungowe (2019) and Okpabi v. Royal Dutch Shell plc (2021) — have allowed foreign victims to sue a UK parent company directly in its home courts over environmental harm caused by a foreign subsidiary, where the parent exercised real control over the relevant activity.

A Practical Example

Suppose a multinational chemical company headquartered in Country P sets uniform safety protocols for all its subsidiaries worldwide, but its subsidiary in Country H, operating under those exact protocols, causes a toxic spill that devastates a river relied upon by local villagers. The Country H subsidiary may have few assets left after the disaster and be unable to pay meaningful compensation. Historically, the villagers' only realistic option was to sue the thinly-capitalised local subsidiary in Country H's own courts, often for a fraction of the real harm. Following the reasoning in Vedanta and Okpabi, the villagers may now also be able to argue, in Country P's own courts, that the parent company itself owed them a duty of care — because it was the parent, not the subsidiary, that actually designed the uniform safety protocol the subsidiary was following — giving them a real chance of proceeding against the party that actually has the resources to pay.

Quick Revision Points

• International law binds States, not companies directly — creating a structural liability gap for MNC-caused environmental harm.
• Bhopal Gas Tragedy (1984): forum non conveniens dismissal in the US sent the case to India; Bhopal Gas Leak Disaster (Processing of Claims) Act, 1985; US $470 million settlement (1989), widely criticised as inadequate.
• Separate corporate personality shields a parent company from a subsidiary's liabilities in ordinary company law.
• Soft-law responses: UN Guiding Principles on Business and Human Rights, 2011; OECD Guidelines for Multinational Enterprises. A binding UN treaty has been under negotiation since 2014 but is not yet concluded.
• Recent trend: home-court "parent duty of care" claims — Vedanta Resources plc v. Lungowe (2019) and Okpabi v. Royal Dutch Shell plc (2021), both UK Supreme Court.