About: http://webisa.webdatacommons.org/261186574

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	However, factors such as high cost, limited availability of places to plug in, and market competition suggest that 13 million is a more realistic number, the report says.
http://www.w3.org/ns/prov#wasQuotedFrom	nationalacademies.org