Question

one word

natural cause of air pollution

Answer 1

burning of fossil fuels.
hope this helps you out

Answer 2

Most of this air pollution we cause results from the burning of fossil fuels, such as coal, oil, natural gas, and gasoline to produce electricity and power our vehicles. Carbon dioxide (CO2) is a good indicator of how much fossil fuel is burned and how much of other pollutants are emitted as a result.