What is global warming? How is it caused?
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harmful ultraviolet rays are entered in the earth the closest to the human beings many skin problems to human being are caused due to global warming
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global warming is the gradual rise in atmospheric temperatures all over the world as a result of the creation of gases that trap energy. these include carbon dioxide and methane.....
the reason how it caused is - current global warming trend is human expansion of the "greenhouse effect"....
hope it helps ...
the reason how it caused is - current global warming trend is human expansion of the "greenhouse effect"....
hope it helps ...
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