According to a 2007 EPA report, between 1980 and 2006 the combined emissions of six major air pollutants decreased by how much?
a. 17%
b. 23%
c. 36%
d. 49%
e. 53%
Answer: D
According to a 2007 EPA report, between 1980 and 2006 the combined emissions of six major air pollutants decreased by how much?
a. 17%
b. 23%
c. 36%
d. 49%
e. 53%
Answer: D
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