<http://schema.org/about>
"The world is in transition from an era of food abundance to one of scarcity. Over the last decade, world grain reserves have fallen by one third. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/sustainable-agriculture/new-era-food-scarcity-echoes-collapsed-civilizations.html>