Question

Which was a major cause of environmental pollution in American cities during the late 1800s?








A.
large numbers of horses used for transportation







B.
chemicals used in dry cleaning shops







C.
dust storms blowing in from the Great Plains







D.
wastewater discharge from hydroelectric power plants

Answer 1

A. large numbers of horses used for transportation

Answer 2

thx @SkyRilio18

Answer 3

A