 This case related to the protection and preservation of the environment free from pollution and maintenance of the ecological balance emphasising the principle of sustainable development.The Supreme Court placed reliance on Article 21 of the Constitution of India but also on the Directive Principles in India in Article 48A and the fundamental duty in Article 51A (g) of every citizen in the Constitution of India.The court was guided by the need to educate people in the doctrine of trust and intergenerational equity that it is the duty of every generation to preserve natural resources for the next generation.