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"Five years ago  Michael Sacco and Graham Corbett showed up in Oaxaca, Mexico with an idea for a solar coffee roaster that would be \"useful and profitable\". They built solar concentrator based on the designs of Canadian inventor Fraser Symington and"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/green-food/chocosol-the-ultimate-green-chocolate.html>