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The Greenhouse Effect
Part 1 of Paper
....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 (60 degrees F). Without them the average would be below the
freezing point of H20. The gases have this effect because .... Part 2 of Paper
....use" gas. It is a major reason why
humid regions experience less cooling at night than do dry regions. However,
variations in the atmosphere's CO2 content are what have played a major role in
past climatic changes. In recent decades there has been a global increase in
atmospheric CO2, largely as a result of the burning of fossil fuels. If the
many other determinants of the Earth's present global climate remain more or
less constant, the CO2 increase should raise the average temperature at th.... |
| Number of words: 604 - Approximate pages: 3 |
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