Steps taken by the government of India to control air pollution includes:

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Permission to use only pure diesel with a maximum of 500 ppm sulfur as fuel for vehicles

Use of non-polluting compressed natural gas (CNG) only as fuel by all buses and trucks

Compulsory PUC (Pollution under control) certification of petrol-driven vehicles, which tests for carbon monoxide and hydrocarbons

Both 2 and 3

answer is D.

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Detailed Solution

Concept- Automakers now provide automobiles powered by compressed gas (CNG). One of the most significant steps the government has taken to reduce pollution is the requirement for PUC (Pollution Under Control) certification.
By increasing the forest cover, pollution can be controlled. Vehicle engines need to be improved to prevent hazardous pollution. Factories should have emission control measures in place.
Air pollution increases the incidence of acute respiratory infections, aggravates asthma, and may be a substantial risk factor for heart illness, stroke, chronic pulmonary obstructive disease, and cancer. Recently, the Indian government committed to a 50 percent decrease in homes using solid fuel for cooking and eliminated subsidies for harmful cooking gas last December to go in this direction.
Hence, option 4 is the correct answer.

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