Forget deep-water drilling; could this be America’s best future source of oil? A company in Massachusetts has engineered an organism that, with water, sun, and CO2, secretes diesel fuel or ethanol. The company Joule Unlimited says it can produce diesel fuel at large facilities and at competitive rates. "If we're half right, this revolutionizes the world's largest industry, which is the oil and gas industry," said Joule’s CEO. "And if we're right, there's no reason why this technology can't change the world." Other scientists are cautiously optimistic about Joule’s claims, saying that a lot still must be demonstrated.