<http://schema.org/about>
"More than 80% of new farmland in the tropics cultivated over the last two decades of the 20th century was carved out of tropical forests, according to new research published in Proceedings of the National Academy of"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/80-of-new-farmland-in-tropics-carved-from-forests-between-1980-2000-land-the-size-of-alaska-cleared.html>