Public Interest Litigation (PIL) allows individuals, groups, or communities to challenge government actions in court to protect public interests. PIL deals with major social and environmental issues involving disadvantaged groups. Where individuals lack resources for litigation, PIL provides access to justice. Successful PIL cases have led to environmental protections, human rights enforcement, and government accountability. However, PIL risks burdening courts and can be constrained by existing laws. An example is a 1996 Indian case where a public organization successfully sued to protect public health from river pollution caused by untreated tannery waste.