I saw a special on GBH a few months ago about Isaac Berzin from MIT and his company GreenFuel Technologies. I don't know if anyone else is familiar with the system they've developed but it's very interesting. He claims that they can reduce CO2 emissions from powerplants by 40% and Nitrous Oxide emissions by 86% while growing algae which they can then use to create ethanol and biodiesel. http://www.usatoday.com/tech/science/2006-01-10-algae-powerplants_x.htm thoughts? seems very IMO. I'm no more than 45 minutes from Boston so I'm thinking of checking out the company and their equipment first hand.