Greenhouse effect

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Trapping and build-up of heat in the atmosphere (troposphere) near the earth’s surface.

Some of the heat flowing back toward space from the earth’s surface is absorbed by water vapor, carbon dioxide, ozone, and several other gases in the atmosphere and then reradiated back toward the earth’s surface. If the atmospheric concentrations of these greenhouse gases rise, the average temperature of the lower atmosphere will gradually increase.

See: greenhouse gas, anthropogenic, climate, global warming.

Links

British Geological Survey: The greenhouse effect