To enforce the use of unleaded petrol in existing two-and three-wheeler vehicles, the Supreme Court of India recently directed the Union government to submit a scheme for supply of unleaded petrol initially in Delhi to fulfil the requirements of 2.2 million two and three-wheeler owners. The court gave the order on September 23 after automobile manufacturers informed the apex court that unleaded petrol could be used in the existing two and three-wheeler vehicles without modifying their engines. Earlier, the court had directed the automobile lobby to reduce the emission level of toxic gases.