"A new biofuel under development by Amyris Biotechnologies, a startup based in Emeryville, CA, could fill that hole. The company's approach is to engineer the metabolic system of microorganisms to create a variety of specialized hydrocarbons."
MIT Technology Review's story makes an interesting follow up to this post from last week:
European airlines say the European Union' plan for a mandatory greenhouse-gas cap and trading system would cripple the industry