<http://schema.org/about>
"It seems that lead contamination is everywhere these days- in jewelry, in 85% of kids' drinks, even Alaskan waters. Lead is a major problem in soil throughout the country as well, spread by car exhaust"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/green-food/crushed-fish-bones-are-the-surprising-solution-for-lead-contaminated-soil.html>