I would have to say the answer is C.
A is incorrect since hydrogen is not an air pollutant.
B is incorrect because ozone is most definitely one of the top.
And D has cyanide which is a chemical for suicide during wars.
Hope this helps!
It is b, increased fertility.
I think it was two weeks if it’s the same thing I remember. I’m not 100% sure
Answer:
p a r a p r o t j e r t e d e c o v i d
Explanation: