Banning vehicles that do not adhere to Euro II norms is a proposition promising enough. Research shows that prohibiting these vehicles from plying can lead to a 55 per cent cut in the pollution level. The Supreme Court had last year directed the Delhi Government to ban vehicles that flout Euro II norms from entering the Capital. Banning these vehicles would lead to less particulate matter being added to the environment, the authorities point out. According to a study carried out by the Centre for Science and Environment(CSE), if the 65,000 non Euro II complaint trucks and goods vehicles ate removed from the Capital's roads, the emission level would drop from 1,700 tonnes to 800 tonnes, a reduction of nearly 55 per cent.