Since some of the compounds that are destroying ozone are found in nature normally, how is it possible to tell that the reactive molecules destroying the ozone are due to our actions?
A. They are accompanied by compounds that are only man-made.
B. The compounds only increased in the past few years.
C. The chemical composition is different than natural compounds.
D. The isotope distribution is unique to man-made elements.
E. all of the above
Answer: A
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