Question

Which of the following should be controlled to reduce air pollution?

• A. Automobile exhaust
• B. Burning of firewood
• C. Windmill
• D. Electric cars

Answer 1

Answer: (A), (B)

Burning of firewood

$\bullet$ Automobile exhaust and burning of firewood produce lots of harmful gases. This causes air pollution as it disturbs the balance between the constituents of air. So, these two things should be controlled inorder to reduce air pollution.
$\bullet$ The windmill is not a source of air pollution. It is regarded as an alternative source of energy. Electric cars run on electricity. Hence, these do not directly cause air pollution.