Steps taken by government of India in controlling air pollution are
A. use of non-polluting Compressed Natural Gas (CNG) only as fuel by all buses and trucks
B. Compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel.
C. Compulsory PUC (Pollution Under Control) certification of petrol driven vehicles which tests for carbon monoxide by hydrocarbons
D. Permission to use only pur diesel
