A Massachusetts biotechnology company says it can produce the fuel that runs Jaguars and jet engines using the same ingredients that make grass grow. Joule Unlimited has invented a genetically-engineered organism that it says simply secretes diesel fuel or ethanol wherever it finds sunlight, water and carbon dioxide. [The] company says it can manipulate the organism to produce the renewable fuels on demand at unprecedented rates, and can do it in facilities large and small at costs comparable to the cheapest fossil fuels. What can it mean? No less than energy independence," Joule's web site tells the world, even if the world's not quite convinced. "We make some lofty claims, all of which we believe, all which we've validated," said Joule chief executive Bill Sims. Joule was founded in 2007. In the last year, it's roughly doubled its employees to 70, closed a $30 million second round of private funding in April and added John Podesta, former White House chief of staff under President Bill Clinton, to its board of directors. The company worked in "stealth mode" for a couple years before it recently began revealing more about what it was doing. This month, it released a peer-reviewed paper it says backs its claims. Joule says its organisms secrete a completed product, already identical to ethanol and the components of diesel fuel, then live on to keep producing it at remarkable rates. Joule claims, for instance, that its cyanobacterium can produce 15,000 gallons of diesel full per acre annually, over four times more than the most efficient algal process for making fuel. And they say they can do it at $30 a barrel. The company plans to break ground on a 10-acre demonstration facility this year, and Sims says they could be operating commercially in less than two years.