Most air pollution is caused by .

burning fossil fules

Explanation:

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.

answer; i believe the correct answer is prefrontal cortex;