A.pre-activity . dicussion 1.what is global warming? 2. Is it a severe problem?why?
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An Global warming,is the observed century - scale ascend in the normal temperature of the Earth's atmosphere framework and its related impacts. Various lines of logical proof demonstrate that the atmosphere framework is warming. A considerable lot of the watched changes since the 1950's are uncommon in the instrumental temperature record which stretches out back to the mid-nineteenth century, and in paleoclimate intermediary records covering a great many years
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