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
S  P Singh
S P Singh took the poll
on Nov 18, 2014 , 10:23 pm
Nisha Garg
Nisha Garg and 8 more commented on the blog by Sonika Garg
on Nov 16, 2014 , 07:04 pm
Now a days among many big problems, one is pollution. Pollution is of many types, among which air pollution is big one. Due to increasing population and industrilization, air pollution is increasing day by day. Due to increase in air pollution, in air CO2 content is increasing in the air. CO2 gas is hot in nature , hence thereby increase temp. of the environment. Due to increase in temp. there is global warming, By effect of this, glacier starts to melt. ,causing floods in ground areas. To more »
Vinay Kumar
Vinay Kumar commented on the discussion by Bhim Prakash
on Nov 16, 2014 , 02:37 pm
Bhim Prakash - Global warming
what is global warming and how it will be controll more »
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