<http://schema.org/about>
"Pew Charitble Trusts has just released its assessment of clean energy investment for 2011, with the US pulling ahead of China to retake first place."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/renewable-energy/united-states-led-world-clean-energy-investment-2011.html>