Question

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

a. dust storms blowing in from the Great Plains
b. chemicals used in dry cleaning shops
c. wastewater discharge from hydroelectric power plants
d. large numbers of horses used for transportation

Answer 1

One of the major causes of environmental pollution in American cities during the late 1800s was "c. wastewater discharge from hydroelectric power plants," since this was part of the Industrial Revolution.