Rusty Wallace recently climbed out of his racecar and in to the role of activist, joining Julia Roberts as a spokesperson and advisory board member for Earth Biofuels, Inc. Wallace and Roberts aren't the only celebs lending their time and talents to the company that produces biofuels; Willie Nelson and Morgan Freeman are also on the board of directors. Though retired from the NASCAR circuit, Wallace remains active in the sport, as a team owner in the NASCAR Busch Series. He's also an auto racing analyst for ESPN and ABC Sports; here's hoping he'll use his high-profile status in the sport to spread the good word about biodiesel. "Biofuels are the future and essential in the energy equation, and Earth Biofuels is leading the way in developing and distributing biodiesel and ethanol fuel," Wallace said. "As someone who has spent his life racing cars, I understand the importance of cleaner burning fuels that provide improved efficiency, while also helping to reduce the nation's dependence on foreign sources." [Yahoo!] via [AutoblogGreen]