<http://schema.org/about>
"The EPA decided this week to limit cancer-causing emissions from hydraulic fracturing, aka 'fracking,' but its new rules won't take effect until 2015."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/energy/blogs/us-to-curb-fracking-emissions-eventually>