<http://schema.org/about>
"The world's glaciers lost 260 gigatons of water each year between 2003 and 2009, making them responsible for almost a third of sea-level rise."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/wilderness-resources/stories/melting-glaciers-responsible-for-one-third-of-sea-level>