About: http://webisa.webdatacommons.org/187141698

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	No one knows for sure how much Earth would have to warm before it reaches the tipping point ??? though about a thousand years ago, there was a time known as the Medieval Warm Period when much of Earth appears to have been unusually warm.
http://www.w3.org/ns/prov#wasQuotedFrom	pjmedia.com