<http://schema.org/about>
"You don't hear as many people touting a hydrogen economy as climate change silver bullet as you once did. Nevertheless work continues of new ways to utilize"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/new-porous-material-developed-for-more-efficient-hydrogen-purification.html>