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Cobalt Biofuels opens plant in California to produce biobutanol from wood waste as other big names also invest in the non-food based biofuel.
Biofuel start-up Cobalt Technologies says it's found a way to make biobutanol with wood from forests ravaged by pine beetles.
The Air Force approves a blend of plant-based fuel with jet fuel for the first time, saying performance for pilots will not be affected.
Ideas for new materials to reduce electronic waste, a critical look at green guru William McDonough, digging into Blacklight Power's clean energy claims, funding for wind projects dries up, Wal-Mart and Duke Power duke it out of solar plan.