ClimateWire: Having launched its first pilot facility yesterday with Gov. Arnold Schwarzenegger looking on, California startup Cobalt Technologies is the latest in a growing number of biofuel ventures banking on biobutanol as an attractive ethanol alternative. Like ethanol, biobutanol can be fermented from plant sugars, either food grains or cellulosic plant parts. But because its structure is heavier than ethanol and more similar to gasoline, the advanced biofuel has a wider range of end uses — …