<http://webisa.webdatacommons.org/prov/483852081>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/337770262> .
<http://webisa.webdatacommons.org/337770262>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/337770262>	<http://www.w3.org/ns/prov#value>	"Reductions in the cost of air pollution control technologies as a result of learning-by-doing, research and development investments, and other factors have been observed over the decades." .
<http://webisa.webdatacommons.org/337770262>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<federalregister.gov> .