Assertion: air pollution | /r/CreatedBy | coal burning
Facets:
value: in london
type: LOCATION
Source sentences:
text: Pollution became a major issue in the United States in the early twentieth century, as progressive reformers took issue with air pollution caused by coal burning, water pollution caused by bad sanitation, and street pollution caused by the 3 million horses who worked in American cities in 1900, generating large quantities of urine and manure.
text: The revised Air Law sets a specific goal of improving air quality and emphasizes the control of air pollution caused by coal burning, industrial production, motor vehicles and vessels, dust, and agricultural activities.
text: Smog" is a contraction of the words "smoke" and "fog," and was originally used to describe air pollution caused by coal burning in London.