Ch 2.doc

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University of Toronto Scarborough
Environmental Science
Jovan Stefanovic

Chapter 2Urban and Transboundary Air PollutionRecognition of the relationship between exposure to air pollutants and respiratory illness dates back to the sixteenth century and description of respiratory disease in minersMuch of what we currently understand about environmental lung disease derives from the study of exposed workers since the Industrial RevolutionLater in the industrial nations of Europe and North America whole communities were engulfed in air pollutants resulting in serious illness and death among individuals with cardiopulmonary diseaseThese air pollution emergencies were caused by air stagnation which resulted in greatly increased concentrations of atmospheric pollutants especially sulfur dioxide and suspended particulatesAfter these air pollution problems more attention has been placed on the health effects of air pollution We face a crisis in worldwide air pollution today because of a few reasonsFirst since the atmosphere is dynamic and always changing contaminants are transported sometimes over thousands of miles diluted precipitated and transformed Air pollution therefore knows no boundaries or national bordersSecond many cities in developing nations and in Eastern Europe are experiencing uncontrolled industrial expansion increasing motor vehicle numbers and congestion and pol
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