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  3. Air pollution is one of the most pervasive environmental problems becauseatm

Air pollution is one of the most pervasive environmental problems becauseatm

游客2023-09-14  88
问题    Air pollution is one of the most pervasive environmental problems because
atmospheric currents can carry contaminated air to every part of the globe.
Most air pollution comes from automobile emissions and from power plants
what burn coal and oil to produce energy for industrial and consumer use.             【S1】______.
Carbon dioxide and other harmful gases releasing into the air from these sources      【S2】______.
adversely effect weather patterns and the health of people, animals and plants.       【S3】______.
   Industrialized nations produce most of the world’s air pollution. For
example, because the United States is home to just 5 percent of the world’s           【S4】______.
population, the country generates 22 percent of human-made carbon dioxide
emissions or 19 percent of all greenhouse gases such as carbon dioxide and            【S5】______.
methane. These emissions harm the environment by leading acid rain and                【S6】______.
global warming, and by depleting(使衰竭) the protective ozone layer which
surround the earth.                                                                   【S7】______.
   Acid rain, a serious threat around the world, occurs when sulfur dioxide
and nitrogen oxide emissions from automobiles and fossil-fuel burning power
plants to fall back to Earth as acidic precipitation. Acid rain has contaminated      【S8】______.
many lakes in Canada and the northeast United States and has been documented
even in the non-industrial state of Hawaii. In the United Kingdom, 57
percent of all trees are severely defoliated(使落叶) owe to corrosive fallout, and    【S9】______.
production of food crops has been declined in many parts of the world. Acid           【S10】______
rain has eroded the surfaces of great art and architectural treasures, including
the ancient sculptures of Rome and the Sphinx in Egypt. [br] 【S6】
选项
答案 leading acid→leading to acid
解析 本句的意思是“这些气体排放通过导致酸雨和全球变暖对环境造成了危害”，固定搭配leading to 才是“导致”的意思。
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