About: http://webisa.webdatacommons.org/39260917

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 useful website, Solar Home, offers an in-depth answer to the question, especially about one of the key materials, silicon.
http://www.w3.org/ns/prov#wasQuotedFrom	cleantechnica.com