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1988年夏季,美国的东海岸出现了本世纪以来罕见的热浪,北美洲发生了严重的干旱,为此,美国中西部农民感到惊恐不安。同年6月23日,美国参议院听取了关于地球气候变化的报告,会上,美国国家航空和宇宙航行局戈达德研究院院长、受人尊敬的大气科学家詹姆斯·汉森(James Hansen)提出了令人惊讶的论断:“自从人类用仪器测量地球温度以来,1988年地球的温度比以往任何时候都高。温室效应正在改变我们现在的气候。”
In the summer of 1988, a rare heat wave emerged on the eastern coast of the United States since the beginning of this century. Severe drought occurred in North America. For this reason, the American farmers in the Midwest were frightened. On June 23 of the same year, the U.S. Senate heard a report on climate change on Earth. At the meeting, James Hansen, the respected atmospheric scientist and president of the Goddard Institute of the National Aeronautics and Space Administration of the United States, presented the report. An astonishing conclusion: “Since humans have used instruments to measure the earth’s temperature, the earth’s temperature was higher in 1988 than ever before. The greenhouse effect is changing our current climate.”