All of the following are on EPA's "four most dangerous indoor air pollutants list," except
a. asbestos
b. radon-222
c. sulfur dioxide
d. cigarette smoke
e. formaldehyde
Answer: C
All of the following are on EPA's "four most dangerous indoor air pollutants list," except
a. asbestos
b. radon-222
c. sulfur dioxide
d. cigarette smoke
e. formaldehyde
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