http://avmedia.popularmechanics.com/audio/PopMechPodcast07242006AltFuels.mp3 Crunching the Numbers on Alternative Fuels http://feedproxy.google.com/~r/ThePopularMechanicsShow/~3/BReiqlS8oP0/PopMechPodcast07242006AltFuels.mp3 2006-07-25 http://media.popularmechanics.com/images/PodcastIcon.jpg