About: http://webisa.webdatacommons.org/144361613

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	Green roofs are built in layers that consist of the following: Specialized waterproofing, root-resistant materials, drainage and/or water storage, and a growing medium such as rocks or soil.
http://www.w3.org/ns/prov#wasQuotedFrom	nsf.gov