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AS.280.335 (10)
Lecture 6

AS.280.335 Lecture 6: Lecture 6 Notes
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Department
AS Public Health Studies, AS Earth & Planetary Sciences, EN Geography & Environmental Engineering
Course Code
AS.280.335
Professor
Yager, James D.; Bressler, Joseph P.

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Description
September 22, 2016 Air Pollution • Donora, PA was a big reason the Clean Air Act was passed • Units are important because they drive regulation • A massive source of air pollution is automobiles • Secondary – not released at the source but they’re involved in transport and fate (something happens in the atmosphere that changes the primary pollutant to a secondary one) • It makes a big deal if we reduce emissions of air pollutants because such reductions save on medical expenditures, as treatment of these diseases in terms of hospitalizations are prevented • Federal government does cost-benefit analysis in setting standards: how many lives are going to be saved versus how much money it’s going to cost • EPA monitors air quality in order to enforce standards • If the data suggests that these standards are too high, then policy on these standards will change (the law itself – Clean Air Act doesn’t). • PM of all sizes is emitted from a range of combustions – in terms of the law, we regulate 2.5s and 10s. • Levels of PM emissions are different from state to state (have different types of toxicity based on different chemicals bound to PM) • The PAH’s you are breathing in can cause lung cancer and the PAH’s you are ingesting can give you intestinal cancer (route of exposure can determine the type of adverse health outcome) • Allergens are big particles
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