Review the details of NAAQS for the criteria pollutants and answer the following questions:

Review the details of NAAQS for the criteria pollutants and answer the following questions:

Subject: Biology    / General Biology   
Question

Part 1: NAAQS Quiz (Short answer)

Go to EPA’s National Ambient Air Quality Standards website homepage at http://www.epa.gov/air/criteria.html. Review the details of NAAQS for the criteria pollutants and answer the following questions:

1. How many criteria pollutants are covered under the NAAQS?

2. In what year was the ozone standard first initiated?

3. For which pollutant has the standard been most recently strengthened?

4. Over what period of time are lead measurements made to assess meeting the standard?

5. What human health effect is associated with exposure to carbon monoxide?

6. List the top two sources of sulfur dioxide emissions in the U.S.

7. Define a “non-attainment” area with respect to the NAAQS.

8. For which regions of the U.S. is attainment of PM10 a particular problem?

Part 2: Choosing national air quality priorities (short essay answer)

Review the background information on each of the pollutants covered under the NAAQS and, based on the available information and considering the questions you addressed above, indicate which ambient air pollutant you believe should be a national regulatory priority for the United States and why. Support your choice by describing the types of health consequences associated with the pollutant (including any susceptible populations), its major sources, and when the standards were last reviewed and/or changed. Then, provide a brief explanation of one or more global implications for regulation of this pollutant by the United States. Be sure to cite your sources.

Part 3: Identify Which Pollutants Significantly Contribute to These Issues

Although many pollutants get a bad reputation, certain types of gas emissions contribute more to specific environmental issues. Review section 4.1 in your text and the background information on each of the pollutants covered under the NAAQS. Choose from among the eight pollutants below and fill in the name of the correct pollutant in the grid below.

chlorofluorocarbons particulate matter dioxins nitrogen dioxide

carbon monoxide sulfur dioxide ozone carbon dioxide

Pollutant Global warming Ozone layer depletion Acid deposition Score

Response (5 points)

yes no no

Response (5 points)

yes yes no

Response (5 points)

no no yes