What are the measures taken by the government to reduce air pollution ?

a. Use of low sulphur petrol and diesel .

b.Use of unleaded petrol .

c. Phasing out of old vehicles.

d.Use of catalytic converters in vehicles .

(a) , (b) , (c) and (d)

The correct answer is Option (2)- (a), (b), (c) and (d)

In the 1990s, Delhi ranked fourth among the 41 most polluted cities of the world. Air pollution problems in Delhi became so serious that a public interest litigation (PIL) was filed in the Supreme Court of India. After being censured very strongly by the Supreme Court, under its directives, the government was asked to take, within a specified time period, appropriate meas- ures, including switching over the entire fleet of public transport, i.e., buses, from diesel to compressed natural gas (CNG). Simultaneously parallel steps taken in Delhi for reducing vehicular pollution include phasing out of old vehicles, use of unleaded petrol, use of low-sulphur petrol and diesel, use of catalytic converters in vehicles, application of stringent pollution-level norms for vehicles, etc.