List three sources of air pollution people cause.

Mobile Sources, Stationary Sources, and Area sources

In my own words.

Explanation:

Mobile sources such as cars and vehicles that run on oil release carbon monoxide which pollutes the air.

Stationary sources such as factories burn fossil fuels and release green-house gasses.

Area sources such as lumber and fire-wood places burn wood and release harmful gasses in the air.

"it built up in the atmosphere"

i think thats it, idk, i tried looking for this exact q& a for grad. and idk if i got this question right or sorry if im wrong