Global warming is a trend toward warmer conditions around the world. Part of the warming is natural; we have experienced a 20,00

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问题     Global warming is a trend toward warmer conditions around the world. Part of the warming is natural; we have experienced a 20,000-year-long warming as the last ice age ended and the ice 【K1】 m ___away. However, we have already reached temperatures that are in【K2】 ______ with other minimum-ice periods, so continued warming is likely not natural. We are contributing to a predicted worldwide increase in temperatures【K3】 ______between 1℃, and 6℃ over the next 100 years. The warming will be more【K4】 d______(急剧的)in some areas, less in others, and some places may even cool off. Likewise, the impact of this warming will be very different 【K5】 d______on where you are—coastal areas must worry about【K6】 ______sea levels, while Siberia and northern Canada may become more habitable and appealing for humans than these areas are now.
    The fact remains, however, that it will likely get warmer, on【K7】 ______, everywhere. Scientists are in general【K8】 a______that the warmer conditions we have been experiencing are at least in part the result of a human-induced global warming trend. Some scientists maintain that the changes we are seeing fall within the range of【K9】 ______(无规律的)variation—some years are cold,【K10】 ______ warm, and we have just had an unremarkable string of warm years recently but that is becoming an increasingly rare interpretation in the face of continued and increasing warm conditions.
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