About: http://webisa.webdatacommons.org/427709821

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	CO2 is a trace gas, which does have a greenhouse warming effect at levels up to 250-300ppm.
http://www.w3.org/ns/prov#wasQuotedFrom	bishop-hill.net