Global warming

Global warming is the rise in the average temperature of Earth's atmosphere and oceans since the late 19th century, and its projected continuation. Since the early 20th century, Earth's mean surface temperature has increased by about 0.8 °C , with about two-thirds of the increase occurring since 1980. Warming of the climate system is unequivocal, and scientists are more than 90% certain that it is primarily caused by increasing concentrations of greenhouse gases produced by human activities such as deforestation and the burning of fossil fuels. These findings are recognized by the national science academies of all major industrialized nations. Climate model projections are summarized in the 2007 Fourth Assessment Report (AR4) by the Intergovernmental Panel on Climate Change (IPCC). They indicate that during the 21st century the global surface temperature is likely to rise a further 1.1 to 2.9 °C for their lowest emissions scenario and 2.4 to 6.4 °C (4.3 to 11.5 ...
Freebase CC-BY
Source: Global warming on Freebase, licensed under CC-BY
Nitesh Kumar
Nitesh Kumar and commented on the poll by Vandana T
on Oct 31, 2014 , 07:38 am
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Nitesh Kumar
Nitesh Kumar and 2 more took the poll by Vandana T
on Oct 31, 2014 , 07:38 am
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Deepak Adhikari
Deepak Adhikari
Deepak Adhikari
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on Oct 28, 2014 , 11:45 pm
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