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1、全球气候变暖英语演讲稿全球气候变暖英语演讲稿 全球变暖英语演讲稿global warming, the gradual increase of the temperature of the earths lower atmosphere as a result of the increase in greenhouse gases since the Industrial Revolution. The temperature of the atmosphere near the earths surface is warmed through a natural process called
2、 the greenhouse effect. Visible, shortwave light comes from the sun to the earth, passing unimpeded through a blanket of thermal, or greenhouse, gases composed largely of water vapor, carbon dioxide, methane, nitrous oxide, and ozone. Infrared radiation reflects off the planets surface toward space
3、but does not easily pass through the thermal blanket. Some of it is trapped and reflected downward, keeping the planet at an average temperature suitable to life, about 60F by 2100 if no action is taken to cut down on the production of greenhouse gases, and a rise of from 1 to 3.6F even if action is
4、 taken on the details necessary to convert the agreement into a binding international treaty, which came into force in 2005 after ratification by more than 125 nations. Improved automobile mileage, reforestation projects, energy efficiency in construction, and national support for mass transit are a
5、mong relatively simpler adjustments that could significantly lower U.S. production of greenhouse gases. More aggressive adjustments include a gradual worldwide shift away from the use of fossil fuels, the elimination of chlorofluorocarbons, and the slowing of deforestation by restructuring the economies of developing nations. In 2002 the Bush administration proposed several voluntary measures for slowing the increase in, instead of reducing, emissions of greenhouses gases 全球气候变暖英语演讲稿
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