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Steps taken by the Government of India to control air pollution include
(a) compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel
(b) compulsory PUC (Pollution Under Control) certification of petrol driven vehicles, which tests for carbon monoxide and hydrocarbons
(c) permission to use only pure diesel with a maximum of 500 ppm sulphur as fuel for vehicles
(d) use of non-polluting Compressed Natural Gas (CNG) only as fuel by all buses and trucks

NEET