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OpenStudy (anonymous):

Which was a major cause of environmental pollution in American cities during the late 1800s? A. chemicals used in dry cleaning shops B. large numbers of horses used for transportation C. wastewater discharge from hydroelectric power plants D. dust storms blowing in from the Great Plains

OpenStudy (anonymous):

cant be b and c pivk the one you think is best out of d and a

OpenStudy (anonymous):

I'm guessing A?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

okay, thanks c:

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