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Uploaded on Tuesday 21 Feb 2012 by GRID-Arendal

Greenhouse effect

Year: 2005 Author: Philippe Rekacewicz, UNEP/GRID-Arendal
Human activities are causing greenhouse gas levels in the atmosphere to increase. This graphic explains how solar energy is absorbed by the earth's surface, causing the earth to warm and to emit infrared radiation. The greenhouse gases then trap the infrared radiation, thus warming the atmosphere.
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Back to the future: The science of building scenarios
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Temperature trends and projections
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Past and future CO2 concentrations
Cooling factors
Kyoto protocol, 2002 target status