apr9notes - Air Pollution The Air Around US Approximately...

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Air Pollution The Air Around US Approximately 147 million metric tons of air pollution are released annually into the atmosphere in the U.S. by human activities. Worldwide emissions total around 2 billion metric tons. Developed countries have been impoving air quality, while air quality in developing world is getting worse. Natural Sources of Air Pollution Natural Fires – Smoke Volcanoes – Ash and acidic components Sea Spray – Sulfur and acid rain Vegetation – Volatile organic compounds ( leads to ozone) and pollen Bacteria – Methane Dust Viruses and Bacteria Human-Caused Air Pollution Primary Pollutants – Released directly from the source. Secondary Pollutants – Modified to a hazardous form after entering the air and mixing with other environmental components. Fugitive Emissions – Do not go through smokestack Dust from construction Leaks from valves and pipe joints Conventional Pollutants US Clean air act designated seven major (conventional or criteria) pollutants for
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This note was uploaded on 05/02/2008 for the course ENVS 1000 taught by Professor Neff,jason during the Spring '07 term at Colorado.

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apr9notes - Air Pollution The Air Around US Approximately...

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