i like this idea better...

OSU Scientists Able To Harness "Plankton Power"

I'm not expert but the world is something like 70% water. Also, plankton is food for fish/whales(both of which are dwindling away) and plankton is also know to pull massive amounts of carbon dioxide (CO2) out of the atmosphere as it photosynthesizes.
EarthTalk: Affordable Eco-Friendly Cars; The Consequences of Dying Plankton on the World's Oceans