Correct option is D
Burning of Fossil Fuels:
· When fossil fuels (like coal, oil, and natural gas) are burned, they release a variety of pollutants into the atmosphere.
· Smoke is composed of a mixture of gases and fine particles, including carbon dioxide (CO₂), sulfur dioxide (SO₂), nitrogen oxides (NOx), and particulate matter, which contribute to air pollution.
· Fly ash is a byproduct of burning coal in power plants and contains fine particles that can be harmful when inhaled. It is also a significant contributor to air pollution.
· The burning of fossil fuels produces smoke and fly ash, which cause air pollution.