TAILIEUCHUNG - Air Quality, Pollution, and Trees

Modern-day smog is often referred to as ‘photochemical’ smog. It is produced by complex, sunlight-stimulated chemical reactions among the components of automobile exhaust. It is responsible for much of today's air pollution in cities such as Los Angeles and Denver. Carbon monoxide from incomplete combustion of automobile engines, particulate matter and NOx all react to generate the noxious brown haze. An estimated 80% of smog today arises from vehicle exhausts. Not only does smog smell bad and obstructs vision, but both short-term and long-term exposure to it may be hazardous. Eye irritation develops upon short-term exposure. . | Air Quality Pollution and Trees Introduction. The Front Range and Air Quality. Air Quality and Health. The Relationship Between Temperature and Air Quality Trees Part of the Air Pollution Solution. Trees Improve Air Quality by Reducing Temperature Modeling Air Pollution Removal With CITYgreen. CITYgreen Methods Results. Discussion. Conclusion 4-1 4-1 4-3 4-3 4-3 4-5 4-6 4-7 4-8 4-9 4-9 P Over 200 000 people in Boulder County face a cancer risk mo-re than 100 times the goal set by the Clean Air P The air quality problem along the northern Front Range of Colorado is distinctly regional in nature. Air pollution from Douglas County to the Wyoming state line collects in the South Platte River Valley and creates the Brown Cloud. In fact the recently completed Northern Front Range Air Quality Study measured levels of PM2 5 in rural areas northeast of Greeley that were as high as levels in downtown Denver 67 Non-attainment area Areas of the country where air pollution levels persistently exceed the national ambient air quality standards may be designated this way. Criteria air pollutants The EPA has set national standards for the six most common air pollutants called criteria air pollutants because the agency has regulated them by first developing health-based criteria science-based guidelines as the basis for setting permissible Air Quality Pollution and Trees Introduction Residents of Boulder witness both the brown skies of winter and the haze of summer. Although local weather patterns can sometimes exasperate air quality on a bad day it is most often the rapid growth of the surrounding metro area that has been blamed for substandard air quality. Air pollution comes primarily from burning fossil fuels both for power generation and in vehicles. Low air quality has been implicated as causing numerous health problems and contributing to rising health care costs. Trees remove a significant amount of pollution from the atmosphere as part of their normal .

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