A. Oxygen. B. Hydrogen. C. Sulfur dioxide. D. Helium. 相关知识点: 试题来源: 解析 C。解析:二氧化硫是空气主要污染物之一,它会导致酸雨等环境问题。A选项氧气是空气的重要组成部分且对生物有益。B选项氢气不是空气污染物。D选项氦气是稀有气体,不是空气污染物。反馈 收藏 ...
The most abundant constituent of atmospheric air is: a. Oxygen b. Hydrogen c. Carbon d. Nitrogen Atmosphere: The atmosphere is a gaseous layer (or layers) surrounding a planet. It surrounds our planet and is made up of 5 different layers each with a characteristi...
aA useful definition of an air pollutant is a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. 空气污染物的一个有用的定义是人直接地或间接地增加的化合物到大气在这样数量至于影响人、动物、植被或者...
Economist: The most economically efficient way to reduce emissions of air pollutants is to tax them in proportion to the damage they are likely to cause. But in Country Y, many serious pollutants are untaxed and unregulated, and policy makers strongly oppose new taxes. Therefore, the best way...
In the United States, the only pollutant for which there is a national air quality standard is lead. A. Y B. N C. NG 如何将EXCEL生成题库手机刷题 > 下载刷刷题APP,拍照搜索答疑 > 手机使用 分享 反馈 收藏 举报 参考答案: C 复制 纠错...
If we focus on the risk of environmental problems brought by the public, the perception is defined as environmental risk perception. Risk perception is one of the most important indicators of public concern about air pollution [24]. By reviewing the rich literature on environmental risk perceptions...
Forestry social science is failing the needs of the people who need it most Rich nations’ fixation on forests as climate offsets has resulted in the needs of those who live in or make a living from these resources being ignored. A broader view and more collaboration between disciplines is...
atomic number 8, O, oxygen - a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust atomic number 54, Xe, xenon - a colorless odorless inert gase...
Importance of air pollution control; What is air pollution; Population of Chile; Details on the health benefits of air pollution control in Chile.doi:10.2307/1244395EskelandGunnar S.American Journal of Agricultural EconomicsEskeland, G.S., 1997. Air pollution requires multipollutant analysis: the ...
In the United States,the only pollutant for which there is a national air quality standard is lead.线索词汇为lead,定位在以lead为小标题的段落,再专找出现有national air quality standard的地方,即末句:“1999年,本国有十个地区空气中铅的含量没有达到国家空气质量标准。”并未出现“铅是唯一有...