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Chapter 14: Air Pollution and Environment

Smog in Seattle, date unknown, but prior to Kingdome destruction in 2000. Source unknown. Chapter 14: Air Pollution and Environment . Big Question: Why Is Air Pollution In Cities Still Such A Big Problem?. A Brief History of Air Pollution. General Effects of Air Pollution.

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Chapter 14: Air Pollution and Environment

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  1. Smog in Seattle, date unknown, but prior to Kingdome destruction in 2000. Source unknown. Chapter 14: Air Pollution and Environment Big Question: Why Is Air Pollution In Cities Still Such A Big Problem?

  2. A Brief History of Air Pollution

  3. General Effects of Air Pollution Air pollution affects much of the environment. It is a significant factor in the death rate of many cities.

  4. Primary and SecondaryPollutants, Natural and Human Air pollutants occur either as gases or particulate matter. • Primary air pollutants: emitted directly into the air. • Secondary pollutants: reactions between primary pollutants and atmospheric compounds.

  5. Major Air Pollutants: Source and Effects Point source pollution in Beijing, China Fugitive source forest fire in eastern Washington, Unknown source

  6. Reduced Emissions

  7. Pollution in Developing Nations

  8. Reducing Urban Air Pollution at Its Source • Keep pollutants from entering the atmosphere. • Reduce, collect, capture, or retain pollutants.

  9. Automobiles

  10. Acid Rain Acid rain (precipitation with a pH below 5.6) is a global problem.

  11. Acid Rain Results from the Burning of Fossil Fuels

  12. Control of Acid Rain A struggle to find solutions for this problem. The real solution: decrease emissions of sulfur dioxide and nitrogen oxides. • Switching from high-sulfur coal to low-sulfur coal • Cleaning up high-sulfur coal by washing it • Coal gasification: converting high-sulfur coal into a gas to remove the sulfur

  13. “Scrubbers”

  14. Atmospheric Structure and the Ozone Shield

  15. Reducing Ozone Depletion:An Environmental Success Story The Montreal Protocol, September 1987 aimed at reducing global emissions of CFCs. Already, the increase in CFC emissions has slowed.

  16. Indoor Air Pollution “Coal miners’ disease” is a major health hazard for underground miners.

  17. Sources and Concentrations of Indoor Air Pollution

  18. Symptoms of Indoor Air Pollution

  19. Controlling Indoor Air Pollution • Offering financial incentives. • Air-conditioning isn’t a cure-all. • Using a combination of strategies. • Radon problems are often easy to fix. • Education is important.

  20. The Cost of Reducing Air Pollution • Varies widely among industries • The law of diminishing returns

  21. Air Pollution in the Future From: Keller&Law. 2007. Arctic Air Pollution: Origins and Impacts. Science 315:1537-1540.

  22. Smog in Seattle, date unknown, but prior to Kingdome destruction in 2000. Source unknown. Chapter 14: Air Pollution and Environment Questions? E-mail your TA. eschelp@uw.edu

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