M.C.Mehta vs Union Of India & Ors

The Supreme Court directed the Governments of Uttar Pradesh, Haryana, and Rajasthan to ensure that commercial traffic not destined for Delhi uses alternative routes to mitigate pollution in the city, as per its order dated 9th October 2015. The Court established that the Environmental Compensation Charge (ECC) should be levied on vehicles entering Delhi, with specific rates for different vehicle categories, while exempting essential service vehicles. The Court emphasized the need for effective enforcement of these measures to reduce pollution levels, referencing its earlier decision in M.C. Mehta v. Union of India (2003) 10 SCC 561.