With IndyCar running on 100% ethanol, do you think NASCAR will follow their lead and switch to biofuels?

I am a race car driver in the Indy Pro Series, the developmental league of IndyCar. I also hold a degree in Biology and I am concerned about the negative impact our sport has on the environment. I adopt an acre of rainforest for every race I run to offset my carbon footprint and I plan on doing more of this as I move into the higher levels of racing. I recently made a trip to Capitol Hill to speak with members of Congress on behalf of the Lieberman Warner Climate Security Act. What do you think we can do to make our sport more environmentally friendly-- recycling programs, biofuels, etc.