| 单词 | acid rain |
| 释义 | acid rain (once / 17936 pages) n Use the noun acid rain when you're talking about polluted precipitation, or rain that's made extremely acidic by dirty practices like burning coal. Environmental scientists use the term acid rain to describe a specific phenomenon, rain that has such a high percentage of acid that it isn't safe for trees or bodies of water. It's caused by the emission of certain chemicals when fossil fuels are burned. Many countries have pledged to lower their emissions and thereby reduce acid rain. The first use of acid rain was in 1859. WORD FAMILYacid rain: acid rains USAGE EXAMPLESNitrogen oxides also contribute to global warming and acid rain, and are a leading cause of the smog that chokes cities like Los Angeles. New York Times(Nov 06, 2016) Adding limestone to the waste coal in fluidized bed boilers reduces sulfur emissions and reduces acid rain. Washington Times(Oct 29, 2016) They took steps that reduced ozone depletion and acid rain . Seattle Times(Aug 29, 2016) n rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water Syn|Hyper acid precipitation air pollution pollution of the atmosphere |
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