Pollution Essay 2000 Words In Pages

Environmental Pollution Essay

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Environmental Pollution and


Waste: Air, Water, and Land Media


Environmental Sustainability Educational Resources


prepared by


Gregory A. Keoleian


Associate Research Scientist,


School of Natural Resources and Environment


Co-Director, Center for Sustainable Systems


University of Michigan

2


Contents • Air Pollution Impacts [slide 4]


• Sources of Air Toxics [slide 5-6]


• Criteria Air Pollutants [slide 7-9]


• Trends in National Emissions of Criteria Pollutants


[slide 10]


• Comparison of 1970 and 1999 Emissions [slide 11-12]


• Comparison of Growth in Population, VMT, GNP with


Emissions [slide 13]


• Percent Change in Air Quality [slide 14]


• Number of People Living in Nonattainment Areas[slide 15]

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• Trends in Sulfur Dioxide Emissions [slides 16]


• Water Pollution [slides 17- 18]


• Sources of Point and Nonpoint Source Pollution [slide 19-22]


• Water Quality of Assessed Rivers, Lakes and Estuaries


[slide 23]


• Pollutants and Sources Causing Impairments of Assessed Rivers,


Lakes and Estuaries [slide 24]


• Toxic Release Inventory [slide 25-28]


• TRI data [slides 29-31]


• Industrial Waste [slides 32-33]


• Municipal Solid Waste [slide 34-35]


• Additional Resources [slide 36-37]

4


Air pollutant impacts


• Greenhouse effect


• Ozone depletion


• acidification


• smog formation


• eutrophication


• human health


• ecosystem health

5

6

7


Criteria Air Pollutants


• EPA uses six "criteria pollutants" as


indicators of air quality


• EPA established for each of them a


maximum concentration above which


adverse effects on human health may occur.

8


Criteria air pollutants


• Nitrogen Dioxide: NO2


- brownish gas irritates the respiratory system originates from


combustion (N2 in air is oxidized); NOx sum of NO, NO2, other


oxides of N


• Ozone: ground level O3


- primary constituent of urban smog


- reaction of VOC + NOx in presence of heat +sun light


• Carbon monoxide: CO


- reduces bloods ability to carry O2


- product of incomplete combustion

9


• Lead: Pb


- cause learning disabilities in children , toxic to liver,


kidney, blood forming organs


- tetraethyl lead - anti knock agent in gasoline


• leaded gasoline has been phased...

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