What is the main reason of Global Warming ?

Firend as we know all that the global warming is going mazor problem for earth, thtat is why the coolnest of earth going down , day by day , what is the main reason of global warming ?

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Global warming is a major issue of this days . the main reason of global warming is are The organic temperature of records the shows that average world temperature at the surface has increased by 0,74 ° C (1,33 ° F) during the twentieth century.Climate model of screenings are summarized the fourth report of the 2007 assessing (AR4) by the Intergovernmental Panel on Climate Change Change (IPCC). Indicate that during the 21st century global temperature at the surface is likely to rise further to 01.05 01.09 ° C (2.7 to 3.4 ° F) for lower an emissions scenario and 03.04 - 06.01 ° C (6,1 έως 11 ° F ) for the highest. These regions are estimates derived from the use of models with different sensitivity to greenhouse gas concentrations in.

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