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Abstract:  During the last decade, the world is in serious fear and confusion about the future because of the widespread opinions of scientists that we are on the threshold of global warming, which will lead to dramatic changes of the Earth and threaten the existence of the people. And most importantly, our fault anyone, but the man himself, polluting the atmosphere, mainly with carbon dioxide and other greenhouse gases. If there is really a problem, it must be learned and to evaluate the human activity.