With America so dependent on oil, filmmaker Joshua Tickell sets out to prove that biodiesel, made from vegetable oil, is a viable alternative. Although politicians and energy execs have done their best to quell it, the benefits of biodiesel are real. This documentary (winner of the Grand Jury Prize at Sundance) chronicles Tickell's quest to popularize the untraditional fuel source, citing the environmental and economic advantages the country could reap by adopting it.