Biofuel Startups Prepare IPOs; Investors Shrug

Trash: Martin Leigh/Oxford Scientifc RM/Getty Images; Khosla: Derick E. Hingle/Bloomberg; Branson: Simon Dawson/Bloomberg; Hay: Jordi Ferre Gicquel/Age Fotostock

As several next-generation biofuel companies prepare stock offerings, investor appetite for the sector may be waning.

Before it's here, it's on the Bloomberg Terminal.