The greenhouse effect is A. something that has occurred for millions of years. B. an unnatural phenomenon caused by humans that maintains Earth’s temperature range. C. the result of the differences in

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asked Jul 15, 2017 53.4k views

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The greenhouse effect is A. something that has occurred for millions of years. B. an unnatural phenomenon caused by humans that maintains Earth’s temperature range. C. the result of the differences in the angle of the sun’s rays. D. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere.