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The Greenhouse Effect
Beginning of essay
, in environmental science, is a popular term for
the effect that certain variable constituents of the Earth's lower atmosphere
have on surface temperatures. These gases--water vapor (H2O), carbon dioxide
(CO2), and methane (CH4)--keep ground temperatures at a global average of about
15 degrees C ....
Middle of essay
....al climate remain more or
less constant, the CO2 increase should raise the average temperature at the
Earth's surface. As the atmosphere warmed, the amount of H2O would probably
also increase, because warm air can contain more H2O than can cooler air. This
process might go on indefinitely. On the other hand, reverse processes could
develop such as increased cloud cover and increased absorption of CO2 by
phytoplankton in the ocean. These would act as natural feedbacks, lowering
temperatures.
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| Number of words: 604 |
Approximate pages: 3 |
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