<http://schema.org/about>
"In efforts to reduce carbon emissions from coal-fired power plants some operators are replacing coal with biomass--that is, at least some of the time, trees. Though claimed to be carbon neutral, as this video above from the NRDC shows, burning"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/fossil-fuels/replacing-coal-with-biomass-for-electricity-is-no-climate-solution-video.html>