Difference between revisions of "Greenhouse gas"

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A '''greenhouse gas''' is [[gas]] in the [[atmosphere]] that contributes to the [[greenhouse effect]].  
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A '''greenhouse gas''' contributes to the [[greenhouse effect]].  
  
 
The most important greenhouse gas is [[water vapor]]. Also important are [[carbon dioxide]], [[methane]], [[nitrous oxide]], and [[ozone]].<ref>http://yosemite.epa.gov/oar/globalwarming.nsf/content/emissions.html</ref>
 
The most important greenhouse gas is [[water vapor]]. Also important are [[carbon dioxide]], [[methane]], [[nitrous oxide]], and [[ozone]].<ref>http://yosemite.epa.gov/oar/globalwarming.nsf/content/emissions.html</ref>

Revision as of 21:36, 8 May 2007

A greenhouse gas contributes to the greenhouse effect.

The most important greenhouse gas is water vapor. Also important are carbon dioxide, methane, nitrous oxide, and ozone.[1]

The nature of a greenhouse gas is to pass visible light, i.e., incoming energy from the sun, but to be opaque to the infrared, i.e., heat energy being re-radiated outward from the earth's surface. This functions much like the glass on a man-made greenhouse, and serves to trap warmth at the surface and in the lower atmosphere.

See also

References

  1. http://yosemite.epa.gov/oar/globalwarming.nsf/content/emissions.html