About: http://webisa.webdatacommons.org/213035236

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	A little over half is the best figure I have been able to locate, and there are big questions about methane leakage in the fracking process.
http://www.w3.org/ns/prov#wasQuotedFrom	hot-topic.co.nz