Which of the following is a common material that is covered under the Clean Air Act standards?
A. Lead
B. Particulate matter
C. Ground level ozone
D. All of the above
A. Incorrect. The standards have been set for six common materials: ground level ozone, carbon monoxide (CO), sulfur dioxide (SO2), particulate matter, lead, and nitrogen dioxide (NO2).
B. Incorrect. The standards have been set for six common materials: ground level ozone, carbon monoxide (CO), sulfur dioxide (SO2), particulate matter, lead, and nitrogen dioxide (NO2).
C. Incorrect. The standards have been set for six common materials: ground level ozone, carbon monoxide (CO), sulfur dioxide (SO2), particulate matter, lead, and nitrogen dioxide (NO2).
D. Correct. The standards have been set for six common materials: ground level ozone, carbon monoxide (CO), sulfur dioxide (SO2), particulate matter, lead, and nitrogen dioxide (NO2).
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