
Sources of natural variable gases and materials include all of the following except
A) flooding.
B) landslides.
C) plants and decaying plants.
D) surface heating.
E) wind.
Correct Answer:
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A)associated with photochemistry.
B)principally associated with
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A)forms acid rain.
B)is
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A)principally sulfur dioxides.
B)particulates such as
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