Smog. Im pretty sure smog is the only unhealthful air pollution on this list.
Acid rain, acid snow, and acid dust. These are the exact three!!!! Hpe this helps!!!
<span>Mesozoic Era is the anwser</span>
1 out of 5 is 1/5.
Divide that and you get .20, which is 20%, so that is your answer, 20% fat.
