KEYWORDS：全球变暖
全球变暖之-全球变暖概述2（双语）
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全球变暖指的是在一段时间中，地球的大气和海洋温度上升的现象，主要是指人为因素造成的温度上升。原因很可能是由于温室气体排放过多造成。
An increase in global temperature will cause sea levels to rise and will change the amount and pattern of precipitation, probably including expansion of subtropical deserts.
The continuing retreat of glaciers, permafrost and sea ice is expected, with warming being strongest in the Arctic. Other likely effects include increases in the intensity of extreme weather events, species extinctions, and changes in agricultural yields.
Political and public debate continues regarding global warming, and what actions (if any) to take in response. The available options are mitigation to reduce further emissions; adaptation to reduce the damage caused by warming; and, more speculatively, geoengineering to reverse global warming. Most national governments have signed and ratified the Kyoto Protocol aimed at reducing greenhouse gas emissions.
责任编辑：sealion1986
