Note
Two major uncertainties of biomass-to-energy research are cost competitiveness and whether sufficient resources such as area, water, etc. are available. Consequently, economic analyses have been used to address these questions. These analyses are generally of two types: the first determines a "state-of-the-art" or baseline energy cost, using biomass yields and conversion performance which might be currently possible. The second kind fixes the price of energy to meet some cost goal and then predicts needed biomass yields and conversion performance in order to reach cost effectiveness.