What results when nitrogen dioxide and hydrocarbons react in the presence of sunlight?

a. photochemical smog
b. industrial smog
c. a thermal inversion
d. acid rain
e. particulate fallout


A

Biology & Microbiology

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A characteristic only shared by angiosperms and gymnosperms is

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What is likely to be the greatest challenge facing the zoned reserve systems of Costa Rica?

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