Which substance would NOT likely cause a person to have an irritated respiratory tract on a sunny day in a large city?
A) PANs
B) carbon dioxide
C) aldehydes
D) ozone

Question

Which substance would NOT likely cause a person to have an irritated respiratory tract on a sunny day in a large city? 
A) PANs 
B) carbon dioxide 
C) aldehydes 
D) ozone

Quizplus · Accepted Answer

Carbon dioxide is a non-toxic gas and does not cause respiratory irritation. The other three options (PANs, aldehydes, and ozone) are all air pollutants that can cause respiratory irritation and other health problems.

Which Substance Would NOT Likely Cause a Person to Have