Carbon dioxide in the atmosphere ____
a. is destroying the ozone layer
b. has dramatically increased in the last few decades
c. is one of the prime reasons for acid depositions
d. is a waste gas produced by respiration and has no biological use
e. can change spontaneously to carbon monoxide in sunlight
ANSWER: b
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____________________ Indicate whether the statement is true or false.
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a. true b. false