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Greenhouse gases in the atmosphere, including water vapour, carbon dioxide, methane, and nitrous oxide, act to make the surface much warmer than this because they absorb and emit heat energy in all directions (including downwards), keeping Earth's surface and lower atmosphere warm Figure B1 Without this greenhouse effect, life as we know it could not have evolved onFluorinated Gases (HFCs, PFCs, SF 6) Fluorinated gases are emitted in smaller quantities than the other greenhouse gases, but what they lack in volume they can make up in potency and long lifespans in the atmosphere, ranging from 1270 years for HFCs to ,000 years for PFCs and about 3,0 years for SF6Gases of the Atmosphere Match each layer with its description _____ exosphere _____ ionosphere _____ mesosphere _____ stratosphere _____ thermosphere _____ troposphere A closest to Earth, where The Science Hoosier Environmental Council Atmosphere diagram greenhouse gases