The purpose of the network of air quality monitoring stations across the United States is
a. to monitor compliance with National Ambient Air Quality Standards.
b. to monitor compliance with the National Emissions Inventory.
c. to monitor compliance with the Environmental Protection Agency.
d. to monitor compliance with the Air Quality Index.
e. to impose environmental responsibility on business and industry.
f. None of the above.
Answer: a. to monitor compliance with National Ambient Air Quality Standards.
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