Answer:
It discusses Pollution levels in the Air
Explanation: Air can be hazardous to those lungs that are weak. They have something called an Air Quality Alert to warn those with weak lungs to take precautions. Hope this helped!
Answer:
the element oxygen , represented by the symbol o, is classified as a pure substance
You're answer would be B) Terrae.
Hope this helps,
♥<em>A.W.E.<u>S.W.A.N.</u></em>♥
