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Which percentage of the U.S. population live in areas with dangerous levels of air pollution?

aleja98

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6 years ago

Which percentage of the U.S. population live in areas with dangerous levels of air pollution?

Which percentage of the U.S. population live in areas with dangerous levels of air pollution?
a. less than 10 percent
b. about 30 percent
c. more than 50 percent
d. less than 20 percent
e. nearly 90 percent

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nudelosr

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aleja98 Author

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6 years ago

Smart ... Thanks!

jaray75

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Brilliant ツ

Gamiung3657

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Thanks

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