全球气候变暖英语演讲稿.doc

全球气候变暖英语演讲稿.doc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 earth" s lower atmosphere as a result of the increase in greenhouse gases since the Industrial Revolution.
The temperature of the atmosphere near the earth" s surface is warmed through a natural process called the greenhouse effect・ Visible, shortwave light es from the sun to the earth, passing unimpeded through a blanket of thermal, or greenhouse, gases posed largely of water vapor, carbon dioxide, methane, nitrous oxide, and ozone. Infrared radiation reflects off the planet' s surface toward space 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 60° F ・
全球变暖英语演讲稿 Growth in industry, agriculture, and transportation since the Industrial Revolution has produced additional quantities of the natural greenhouse gases plus chlorofluorocarbons and other gases, augmenting the thermal blanket
・ It is generally accepted that this increase in the quantity of greenhouse gases is trapping more heat and increasing global temperatures, making a process that has been beneficial to life potentially disruptive and harmful・ During the past century, the atmospheric temperature has risen 1. 1° F , and sea level has risen several inches・ Some projected, longer-term resuIts of global warming