<http://schema.org/alternativeHeadline>
"Savor this last day of April 2014\u2014it has been a remarkable month in the history of the earth."^^<http://www.w3.org/2001/XMLSchema#string>
<http://qz.com/204598/carbon-dioxide-just-hit-levels-not-seen-since-mastodons-were-a-thing/>