<http://schema.org/alternativeHeadline>
"Fracking for shale gas may be dangerous, but the international agency offers a list of rules it says can make the process 'environmentally acceptable.'"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/energy/blogs/iea-pollution-threatens-golden-age-of-gas>