The German National Academy of Sciences - Deutsche Akademie der Naturforscher Leopoldina has published a report claiming that waste is the only viable feedstock for the production of bioenergy, but cautioned as to its availability and optimal use.

The report claimed that the expectations set for bioenergy are too high, and that in Germany the availability of biomass as an energy source is very low relative to the country's primary energy consumption and that few bioenergy sources are without environmental, ecological and climate risks. The report is critical of previous research th...