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*Without the [[greenhouse effect]] life on this planet would probably not exist as the average temperature of the Earth would be a chilly -18° Celsius, rather than the present 15° Celsius. [http://www.physicalgeography.net/fundamentals/7h.html]
*Without the [[greenhouse effect]] life on this planet would probably not exist as the average temperature of the Earth would be a chilly -18° Celsius, rather than the present 15° Celsius. [http://www.physicalgeography.net/fundamentals/7h.html]
[[Category:Earth Science]]
[[Category:Earth science]]