<http://schema.org/about>
"Another study on Americans' attitudes towards global warming from the Yale Project on Climate Change has been released. Classifying people's attitudes into six categories of concern and awareness, the study found that while"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/nearly-40-of-americans-alarmed-or-concerned-about-climate-change-but-those-dismissing-it-double.html>