PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The two most importantpollutants that contribute to the formation of acid rain are nitrogen oxide and sulfur dioxide, which react with moisture in the atmosphere to form nitric and sulfuric acid.The sulfur and nitrogen compounds that contribute to acid rain primarily come from anthropogenic sources, such as industries, utilities, automobiles and other forms of transportation.
http://www.w3.org/ns/prov#wasQuotedFrom
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