Doesn’t look like much to me, but according to USDA’s Agricultural Research Service this is a picture of a prototype membrane that could be used to conduct ions in a hydrogen fuel cell. In an effort to reduce “American dependence on petroleum-based fuels,” researchers at ARS’ Environmental Management and Byproduct Utilization Laboratory in Beltsville, Md., have conducted preliminary studies which suggest the possibility of replacing the conventional petroleum-based main membrane in hydrogen fuel cells with biological products. Not saying exactly what the membrane is being made from except that it’s bio-based and non-petroleum made from “naturally occuring products.”