The greenhouse effect of carbon dioxide was described in 1824 by the French mathematician and physicist Jean-Baptiste Fourier. And in 1896 the Swedish Nobel Prize winner Svante Arrhenius calculated with a simple physical model that could result in a doubling of CO2 concentrations in a temperature increase of about 4 to 6 degrees. The carbon dioxide has a surprisingly low concentration in the air, which is now at about 0.038 percent. With such small numbers are usually not the ratio in percent (= part per hundred), but as ppm (part per million; English parts per million). 0.038 percent are then 380 ppm.
late 70s diagnosed for the first time a major scientific organization - the American National Academy of Science - climate change. End of the 80s took to the reports. In 1988, the UNEP (the Environment Agency of the United Nations) and the World Meteorological Organization (WMO), the IPCC, just the International Committee said on the study of climate change (IPCC - Intergovernmental Panel on Climate Change), which scientists from many countries belong, review the progress of research and report on the further development of public. In 1990, the first climate report of the IPCC, Other reports followed in 1996, 2001 and 2007.
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