<http://schema.org/description>
"Tree cover in the lower 48 U.S. states amounts to 659 million acres, more than one-third of the country, a U.S. Forest Service study has found."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Science_News/2012/08/06/New-Hampshire-leads-US-in-tree-cover/UPI-30801344282163/>