PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Cities are major contributors to climate change: although they cover less than 2 per cent of the earth???s surface, cities consume 78 per cent of the world???s energy and produce more than 60% of all carbon dioxide and significant amounts of other greenhouse gas emissions, mainly through energy generation, vehicles, industry, and biomass use.
http://www.w3.org/ns/prov#wasQuotedFrom
  • unhabitat.org