Is global warming a serious threat? As human technology has been developed by scientists and researchers, we not only get a comfort in living throughout our life but it also helps people to find more jobs and less popery. However, on the other hand, there are some increasing problems on our planet earth due to human activities. They increased the global temperature about 0.5F to 1.1F (0.3~0.6C) since the last half of the 19th century (Global warming 1). The increase in global warming causes the "raising sea level", "changing precipitation", and "other local climate conditions" (ESP impacts of Climate Change ....

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