According to a 2007 EPA report, between 1980 and 2006 the combined emissions of six major air pollutants decreased by how much?

According to a 2007 EPA report, between 1980 and 2006 the combined emissions of six major air pollutants decreased by how much?

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