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-Referring to the Graph, What Is Responsible for the Downward

Question 98

Multiple Choice

-Referring to the graph, what is responsible for the downward trend in these pollutants? A) population decrease B) people driving fewer miles C) enactment of the U.S.Clean Air Act D) different measurement techniques
-Referring to the graph, what is responsible for the downward trend in these pollutants?


A) population decrease
B) people driving fewer miles
C) enactment of the U.S.Clean Air Act
D) different measurement techniques

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