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

Question

anonymous · Answer

A.
	coal-fired stoves, factories, and power plants
	
 
B.
	diesel-powered railroad locomotives
	
 
C.
	internal-combustion engines in automobiles
	
 
D.
	electric-powered streetcars

anonymous · Answer

A.

joel_the_boss · Answer

I agree with A, 

This was America's industrial revolution, they had a lot of factories and of course burning things was what got things working.

thesmartone · Answer

@damonstan_1864 I advise you not to give direct answers from next time as it is against the CoC. Thank you. http://openstudy.com/code-of-conduct

anonymous · Answer

@TheSmartOne new to this site so...sorry?

thesmartone · Answer

Its ok. Since you are new you can read this. http://openstudy.com/study#/updates/543de42fe4b0b3c6e146b5e8