On april 5, the Supreme Court finalised its order on the use of compressed natural gas (cng) buses in Delhi, ensured that an adequate supply of cng would be available to the transport sector, imposed fines on diesel bus operators who continued to flout the apex court's order and scheduled the supply of buses on a realistic basis to convert Delhi's fleet of buses to cng. The diesel lobby and some commuters are furious. Should the Supreme Court be doing these things? Are courts taking over government? Every citizen has a right to health and clean environment. A huge amount of literature persuaded the court that Delhi's citizens lived at their own peril. There was little dispute, on the basis of studies