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燃烧排放对大气的影响：新工具和技术The Impact of Combustion Emissions on the Atmosphere: New Tools and Techniques |
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| 课程网址: | http://videolectures.net/mitworld_kolb_tioc/ |
| 主讲教师: | Charles E. Kolb |
| 开课单位: | 航空研究公司 |
| 开课时间: | 2010-08-06 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | If you’re not quite sold on the link between man-made pollutants, toxic air and climate change, this lecture will extinguish any remaining doubts. Charles Kolb has chased buses, trucks and cars in Mexico City and New York City with a state-of-the-art mobile detection unit, and measured the precise quantity of gases and particulates released in the vehicles’ exhaust plumes. The picture is neither pretty nor predictable: in Mexico City, vehicles released not only carbon dioxide (implicated in global warming), but a surprising amount of formaldehyde, (a known carcinogen), and ammonia. New York City diesel buses engineered to reduce soot exhaust ended up producing large quantities of an even more disagreeable pollutant. Kolb reminds us to pay attention to the really big picture—the troposphere and stratosphere—where many of these human chemicals do their damage. It turns out that fossil fuel combustion (from vehicles, heating, cooling and industries) sends about 28 gigatons of carbon dioxide into the atmosphere on an annual basis. Green plants act as “sinks,” soaking up about half of that excess, but civilization is inexorably building up this gas and driving up global temperatures. |
| 关 键 词: | 人造污染物; 公共汽车; 全球变暖 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2019-06-04：cwx |
| 阅读次数: | 36 |