I work at a local Biomass power plant that produces about 15 megs/day. We burn woodwaste, hog fuel and sawdust as well as wood chips hence the renewable energy/green label yet we make so much CO and NOx that the label "green" is a joke. Down in Colusa PGE just built a 500 meg Natural Gas plant that is also called "green" because of a scrubber that limits emissions. They will do anything to meet the 20% green energy requirement here in Calif. yet it is all smoke and mirrors.