Which of the following best matches the description?Substances released into the atmosphere, which in their unmodified form are a health risk.
A. greenhouse effect
B. particulates
C. oxides of nitrogen
D. acid deposition
E. ozone
F. thermal inversion
G. sulfur dioxide
H. secondary air pollutants
I. radon
J. photochemical smog
K. primary air pollutants
Answer: K
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What will be an ideal response?
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Answer the following statement true (T) or false (F)