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Absorbs Earth's radiation, produced by humans and nonhumans (dino gas may have warmed globe), include CO2 and H2O vapor, H2O vapor is most powerful absorber of radiation emitted by Earth.
So this  natural greenhouse effect is very useful.    The gases that keep the earth warm are called greenhouse  gases. The most important gas, causing about 75% of the  natural greenhouse effect, is water vapor.The next most important  is carbon dioxide.o this  natural greenhouse effect is very useful.    The gases that keep the earth warm are called greenhouse  gases. The most important gas, causing about 75% of the  natural greenhouse effect, is water vapor.