About: http://webisa.webdatacommons.org/10312259

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Over the last 20 years emissions trading has become a core component of United States??? efforts to reduce air pollution and acid rain caused mainly by NOx and SO2 generated by industry and other large stationary sources of emissions.
http://www.w3.org/ns/prov#wasQuotedFrom	panda.org