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Global_Warming

2013-11-13 来源: 类别: 更多范文

Global Warming Global Warming is the rising of the Earth’s surface temperature due to chemicals in the atmosphere. Global Warming has many threats on the climate and even the health of the people on this planet. Some of these threats include the altering of crop seasons and even effect the way organisms survive on the planet. The first thing I think I should discuss when talking about global warming is what causes it to occur. Gases such as carbon dioxide, methane and nitrous oxide, which are known as greenhouse gases, all build up in the atmosphere of the earth. All these gases make it so that it becomes harder for the radiation that the sun shines into the atmosphere to escape. The heat continues to build up and this is what causes the temperatures to increase. I know this seems like the temperatures increase massively but in the last hundred years the average temperature of the Earth has gone up between 0.8 and 1.0 degrees farenheight(1). Also, in the last fifteen years, we have had the ten warmest years in record.(1) Global warming is not always a negative process though. Without global warming, the Earth’s temperature would be a lot lower than the 60-degree average. Unfortunately due to there being many more harmful “greenhouse temperature, warming, temperatures, heat, global, sea, rise, causes, world, much, levels, gases, years, normal, increase, cities, atmosphere, around, water, ten, rising, process, melting, massive, live, last, greenhouse, glaciers, degrees, crops, cause, being, been, becomes, area, york
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