<http://schema.org/about>
"In every society where incomes have risen, the appetite for meat, milk, eggs, and seafood has generated an enormous growth in animal protein consumption. Today some 3 billion people are moving up the food chain. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/sustainable-agriculture/moving-food-chain.html>