We Want Scum

A green thumb in Texas has figured out a more efficient way to produce algae. While ordinarily known as "pond scum" and not something you would want to produce in bulk, algae turns out to be one of the most efficient ways to produce biomatter for ethanol/biodiesel production. And not just a little better -- they're claiming about 2000 times more output per acre of the next-best crop (soybeans).