<http://schema.org/about>
"In the first ever global analysis of how dams impact food security and livelihoods, The Nature Conservancy and partners found that at least 472 million people have experienced the downside of dams. The new study"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-water/new-report-472-million-people-worldwide-negatively-affected-by-dams.html>