<http://schema.org/description>
"When European settlers arrived in North America in the 1600s, they found vast forests stretching from the Atlantic Ocean to the Mississippi River. Nearly 40 percent of the land north of Mexico lay beneath tree cover. So how much has changed?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://science.howstuffworks.com/timber-quiz3.htm>