The report“Life Cycle Assessment of Energy Products: Environmental Assessment of Biofuels”  contains the results of the Environmental Impact Studies and Life Cycle Assessment (LCA) of biofuels made in Switzerland.  Some of the biofuels under study were bioethanol, biomethanol, biodiesel and biogas.  Some of the highlights of the report are:
(1) major environmental impacts of biofuels are due to agricultural production of biomass feedstocks, (2) impacts of biofuel processing were lower, (3) in most biofuels, a trade-off exists between minimizing greenhouse gas emissions and having a positive LCA, (4) “not all biofuels per se” have the capability to reduce environmental impacts relative to fossil fuels, (5) the use of agricultural residues (“biogenic wastes”) for biofuel feedstocks, such as grass and woody materials, provides the best biofuel processing pathway for reducing environmental impacts..