Less than a year after the Bhopal disaster, an oleum gas leak from a Shriram unit in Delhi prompted the Supreme Court — through a Constitution Bench led by Bhagwati CJ — to depart from the English strict-liability framework of Rylands v. Fletcher and to formulate a doctrine of absolute liability for enterprises engaged in hazardous activities. The judgment is the doctrinal foundation of Indian environmental and industrial liability law. A digest of the rule, why the Court declined to apply Rylands, and how the doctrine continues to operate four decades on.