It is best to say that most human sources of air pollution result from _______.
a.
forestry management
b.
fuel burning
c.
heating devices
d.
vehicle exhaust
It is best to say that most human sources of air pollution result from fuel burning.
Expert answered|
JANDY|Points 3721|
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Asked 12/9/2015 6:01:31 AM
Updated 12/9/2015 6:21:29 AM
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