Air pollution global

AIR POLLUTION, GLOBAL CHANGE AND FORESTS IN THE NEW MILLENNIUM, III Edited by D.F. Karnosky, K.E. Percy, A.H. Chappelka, C. Simpson and J. Pikkarainen... 

In the past 25 years, we have become concerned with a third scale of air pollution—global. Global pollutants affect the entire atmosphere of the earth. Two global air pollutants of special note include carbon dioxide and halocarbons. 

Many complicated issues remain at the forefront of meteorology, including air pollution, global warming, El Nino events, climate change, ozone hole, and acid rain issues. 

Gupta, R. S. 2004. Introduction to Environmental Engineering and Science, 2nd ed. Rockville, MD ABS Consulting, Government Institute. An introduction to the fundamental principles common to most environmental problems is followed by major sections on water pollution, hazardous wastes and risk assessment, waste treatment, air pollution, global climate change, and hazardous substances. Includes problems to develop skills learned in the text. 

Problems of air pollution exist on all scales from extremely local to global. These are divided in this chapter into five different scales local, urban, regional, continental, and global. The local scale includes up to about 5 km. The urban scale extends to the order of 50 km. The regional scale is from 50 to 500 km. Continental scales are from 500 to several thousand km. Of course, the global scale extends worldwide. 

One air pollution problem of a global nature is the release of chlorofluoro-carbons used as propellants in spray cans and in air conditioners and their effect on the ozone layer high in the atmosphere. (See Chapter 11.)... 

The harmful effects of air pollutants on human beings have been the major reason for efforts to understand and control their sources. During the past two decades, research on acidic deposition on water-based ecosystems has helped to reemphasize the importance of air pollutants in other receptors, such as soil-based ecosystems (1). When discussing the impact of air pollutants on ecosystems, the matter of scale becomes important. We will discuss three examples of elements which interact with air, water, and soil media on different geographic scales. These are the carbon cycle on a global scale, the sulfur cycle on a regional scale, and the fluoride cycle on a local scale. 

Energy use is the predominant source of global air pollution, though other human actions produce sig-... 

Power plant emissions result from the comhustion of fossil fuels such as coal, gas, and oil. These emissions include sulfur dioxide (SO,), nitrogen oxides (NO.,), particulate matter, and hazardous air pollutants, all of which are subject to environmental regulations. Another emission is carbon dioxide (CO,), suspected of being responsible for global warming. 

In contrast, your car s engine produces small amounts of air pollutants such as NO and copious amounts of C02, which contributes to global warming. On the other hand, there are a couple of deterrents to the use of fuel cells, i.e.—... 

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