The Environmental Protection Agency (EPA) last month approved the "advanced" categorization for a new process that creates biodiesel from biogenic waste oils, fats and greases. The new process has to yield a 50 percent reduction in lifecycle greenhouse gas (GHG) emissions. It utilizes high free fatty acid (FFA) feedstocks as opposed to the vegetable and algal oils considered as part of the normal processes. There are also minor differences in the yield and amounts of co-products produced, which generally lead to reductions in lifecycle GHG emissions for the new pathway.Meanwhile, we recount that sorghum has been proposed as a feedstock for advanced biofuel when processed under certain conditions. Additionally, EPA officials last week were...