5Global warming-国家地理——全球变暖 Global warming

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• 咕噜老K:1.For 2.5 million years, the earth climate has fluctuated cycling from ice ages to warmer periods. But in the last century, the planet’s temperature has risen unusually fast about 1.2 to 1.4 degree spare height. 2. Scientists believe it's human activity that driving the temperatures up, a process known as global warming. Ever since the industrial revolution began ,factories, power plants, and eventually cars can burn fossil fuels such as oil and coal, releasing huge amounts of carbon dioxide and other gases into the atmosphere. 3. These greenhouse gases trap heat near the earth through a naturally occurring process called greenhouse effect. The greenhouse effect begins with the sun, and the energy radiates to the earth. The earth and the atmosphere adsorb some of these energy, 一点点文本，[跪了]
• 咕噜老K:我还会再来的，
• -德川家康薛定谔:第一眼看成了 globalb warning [2233娘_郁闷]