Global warming, in other words"Global warm up", which refers to climatic change in one period, that makes temperature raising in atmosphere and ocean caused by green effect, and this is one of tragedy in common place, which leads to one effect, namely——Global Warm Effect.
The impact of human including some green gas, such as CO2, Methane, Natrous Oxide, in view of human play a main part in Global effect, thus this phenomena sometimes called "manmade global warm" or "manmade climat change" as well. According to emmisions of green gas, the surface temperature on earth will further reach up to 0.3-1.7c to 2.6-4.8c by 21 century through the prediction and and conclusion of climatic modele from the report. This discoveries have been accredited by academy institution in some develped countries, in addition, there are no one countries or international status academic institution raise the contention
The climatc change and relevant impact caused by it in the future will meet regional differences, that including sea level rise, alteration of rainfall, expansion of desertization in subtropical zone, which these impacts is researching or has been predicted. It's predicted that the land warm will be bad to worse than sea in the future, the more severe is continuing decline of arctic, glacier, permafrost and seawater. And the alteration in other zones including more frequently extreme weather such as hot-wave, drought, mountain fire, flood, snowstorm, large-scale animal extinction triggerd by oceanic acidification and temperature change. These will make huge imact on human, including food security crisis caused by reduction of crops and sea level rise, so that human have to move out of some densely-populated zone.