About: http://webisa.webdatacommons.org/301591231

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	Gases of particular interest include ammonia, odorous compounds, and greenhouse gases such as methane, carbon dioxide, and nitrous oxides.
http://www.w3.org/ns/prov#wasQuotedFrom	usda.gov