ABC News has a nice feature on ethanol in the IndyCar Series that features comments from drivers, ethanol industry representatives, race car engineers and President Bush.

If you go to an IndyCar racing track this season, you might notice there’s something different in the air: Instead of fuel, it smells a little like popcorn.

“It’s a bit sweet, I think — more of an organic smell,” explains race car driver Jeff Simmons, the driver of Rahal Letterman Racing’s Team Ethanol Honda/Dallara in the IndyCar series.