Sources
http://www.eia.doe.gov/kids/contactinfo.html#permission
http://www.techstore.ie/Renewable-Energy/Biomass-Energy/Biomass-Energy-Pros-and-Cons.htm
http://www.sovereignty.org.uk
http://www.arcacia.com/niavision/playing/biomass.html
http://www.geocities.com/njacques234/biomass1.html
http://www.ucsusa.org/clean_energy/renewable_energy_basics/offmen-how-biomass-energy-works.html
http://www.energyquest.ca.gov/story/chapter10_flash/index.html