<http://schema.org/about>
"We've all heard of cradle-to-cradle design, which is design that mimics natural life cycles during which something is made of materials, runs its useful life cycle, and at the end of that useful life cycle, becomes material"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/interior-design/trash-me-lamps-take-on-grave-to-grave-design.html>