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Abstract
Recently people believe that the earth is gradually heating, because greenhouse gas (GHG) in the air has been dense, especially carbon dioxide (CO2) emitted when fossil fuel is burned. On the other hand, some claim that human beings are not much involving this global warming and the causes must be the other influential. For example, some scientists suggest that CO2 should be ineffective because water vapor might have more greenhouse effect than CO2. Also, some insist that the decrease if albedo should be the cause. However, the ordinary theory has refuted these skepticisms and it introduces "climate feedback". In another theory, Svensmark suggests that the cosmic ray emitted from the sun is increasing and it affects the temperature of the earth. His theory cannot be denied because we have no time to study enough. We should not assume CO2 is the only causes for climate change and always think about and discuss it. Otherwise, we might get into panic if artificial GHG emission is not the real cause. We should try hard reducing the emission of GHG and also practice other ideas such as the pool of CO2 or increasing the albedo. It is important for us not to stop thinking about the global climate change, because we human beings are still too small and ignorant to know the entire knowledge.
※引用先を示すことなく以上の文章を複製・流用することは禁じます。また、この文書はそれらの行為を助長するためのものではありません。
You must not copy or use this article without citation. Moreover, this article is not written for encouraging those things.
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