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据联合国政府间气候变化委员会(IPCC)的预测:21世纪中叶,大气中CO_2等温室气体含量将增加1倍,导致全球气温上升1.0～3.5℃,它相当于将夏季延长40天以上。冬季在北方和中部地区缩短20～30天;春、秋季节将变得来去匆匆,全年无“冬季”的南方将更加温暖。近年来,因全球变暖,我国不少地方“发烧”,三北地区的夏季早临,并出现一些新的“火炉”城市。如北京,今年7月“入伏”以来,已连续数天温度高达37℃以上,“高烧”不退;而在1999年7月出现35℃以上高温的天数多于10天,创百
According to the UN’s Intergovernmental Panel on Climate Change (IPCC), the atmospheric CO2, such as CO 2, will double in the mid-21st century, resulting in a global warming of 1.0-3.5 ° C, equivalent to extending the summer over 40 days. Winter is shortened by 20-30 days in the northern and central regions; the spring and autumn seasons will be hurried, and the year-round “winter” will be warmer in the south. In recent years, due to global warming, many places in our country have “fever” and summer in the Three North region comes to an end. There are some new “stoves” cities. Such as Beijing, “into the volt” in July this year, the temperature has been as high as 37 ℃ for several days, “high fever” no refund; and in July 1999 appeared more than 35 days above the temperature of more than 10 days, a hundred