<http://schema.org/description>
"CO2 levels surpassed 400 ppm in September. Scientists say we won't see a month below that symbolic benchmark 'ever again'."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.huffingtonpost.com.au/2016/09/28/we-just-passed-a-grim-carbon-dioxide-threshold-possibly-for-goo/>