<http://schema.org/about>
"Last week in this column, I talked about several ways for raising energy efficiency mainly through recycling. Raising the energy efficiency of the materials we use commensurately cuts carbon dioxide (CO2) emissions. (You may want to see our overall plan"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/sustainable-product-design/raising-energy-efficiency-in-a-new-materials-economy-part-ii.html>