Greenhouse Effect & Global Warming
The greenhouse
effect is a natural phenomenon that occurs when certain gases
in the atmosphere, especially water vapor, carbon dioxide and
methane, cause the Earth’s surface to heat up more than it
otherwise would, thereby maintaining a global average
temperature warm enough to support life as we know it.
Global warming, also called global climate change, occurs
when the amounts of carbon dioxide and other such gases in
the atmosphere increase beyond natural levels, thereby
intensifying the greenhouse effect.
Increased carbon
dioxide levels can result from human activities such as the
burning of coal, oil and gas and the clearing of forests
without replanting. |
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