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!
A? Imma assume I mean I don’t play baseball and I really just need and answer so i can ask my own questions
We live longer, We heal quicker, We have low blood pressure, We bolster our immune systems, We are more physically fit, We enjoy good heart health and We feel less pain
Hola
Explanation:
Hola cómo estás amigos de brainless los quiero mucho ay los vemos son unos tarados
