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Friday, February 23, 2007


ThE greenhouse EffEcT

The greenhouse effect, is discovered by Joseph Fourier in 1824, and is investigated quantitatively by Svante Arrhenius in 1896, is the process in which the emission of infrared radiation by an atmosphere warms a planet's surface. In the case of the Earth, without these greenhouse gases its surface would be up to 30°C cooler. The name comes from an incorrect analogy with the way in which greenhouses are heated by the sun in order to facilitate plant growth. In addition to the Earth, Mars, and especially Venus have greenhouse effects.
In common parlance, the term "greenhouse effect" may be used to refer either to the natural greenhouse effect, due to naturally occurring greenhouse gases, or to the enhanced
anthropogenic greenhouse effect, which results from gases emitted as a result of human activities see also
global warming, scientific opinion on climate change and attribution of recent climate change.

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