A new kind of fuel cell has been developed by a New England firm that does not need hydrogen. It will run on propane, natural gas, diesel fuel, and bio-diesel. Using these more common fuels means the fuel cell does produce some CO2, but only about half as much as a more conventional generator. This appears to be more than early marketing of a design concept, as the company (Acumentrics Corporation) says it already has thirty systems working and deployed.