It is now clear, depending on where the boundary is set in life-cycle estimates of carbon emissions, 
that some biofuels offer limited or no benefits compared with conventional gasoline
London / Reuters / A stalled biofuel industry will need to produce far more efficient fuels to avoid setting off another bout of arguments over its contribution to boosting energy security and cutting carbon emissions. Biofuels had a difficult 2012. In the United States, Energy Information Administration data show production through November fell compared with
