The massive oil spill in the Gulf of Mexico has spurred calls for cleaner alternative fuels, but advanced-biofuel companies are unable to meet this demand because of an inability to scale up to commercial production, according to this article. "We've had a lot of industries tell us: Don't show tell us you have the perfect molecule. Don't tell us you can produce it for $1.05 a gallon. Show us you can do it at scale," said Jonathan Wolfson, CEO of Solazyme.

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