GianthNaif GianthNaif

01-07-2016
Geography

contestada

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.

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Jacobie05 Jacobie05

01-07-2016

d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere.

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