Which of the following is not a source of air pollution?
Fertilizers
Fertilizer is not a source of air pollution. It causes water and soil pollution.
The sources of air pollution are:
i. Coal based power generation plants - Releases smoke and particulate matter which causes pollution.
ii. Chemical factories - Releases harmful chemicals in the form of smoke affecting the atmosphere.
iii. Volcanoes - Due to volcanic eruptions, large amounts of smoke, dust and various poisonous gases are released into the air causing pollution.