ClimateBiz: Funny thing about the biofuels business. Roughly 200 companies are pursuing the perfect biofuel — as cheap as fossil fuels, adaptable to today’s infrastructure, low-carbon, sustainable and no threat to the food supply or to tropical forests. But even cutting-edge startups that say they have the puzzle just about solved can’t raise the money they need to get into commercial production. “Everyone wants to be the first to finance the second plant,” says Arnold Klann, the CEO of biofuels …