Global warming can be the result of natural causes-and can also be the result of man-made, or anthropogenic causes. Natural causes created by nature. One natural cause is a release of methane gas form Arctic tundra and wetlands. Another natural cause is that the Earth goes through a cycle of climate change which usually lasts about 40,000 years. Man-madecauses, however, probably do the most damage.
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This a short video on global warming were u can understand the effects of it and many more things about it .
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