82 The feedstock has a negative cost because the existing costs of disposing of the waste are avoided.
77 Woodrising Consulting, 1999, http://www.cec.org/files/PDF/ECONOMY/Biomass-StageI_en.pdf 78 Opportunities and Challenges of a Bio-based Economy http://www.carc-crac.ca/common/Opportunities%20and%20Challenges%20of%20a%20Bio%20based%20Economy.pdf 79 Bio-Energy in Europe: