<http://schema.org/about>
"Water. It's one of the most essential elements of life on Earth. Yet nearly 1 billion people don't have access to safe drinking water. Our fresh water supplies are badly polluted and over-allocated. And the waste that occurs from the agricultural"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-water/is-water-the-new-oil-emwater-mattersem-explains-the-crisis-and-solutions-book-review.html>