Photos: Dealers hold the keys to biodiesel cars

Steve Ahl has specialized in selling Volkswagen passenger diesels for more than four years. He's installing solar panels at his lot in Ukiah in Northern California. Most of his customers show interest in biodiesel or vegetable oil for a variety of ecological, economical and political motivations. Ahl and other used diesel dealers said they don't anticipate the introduction of cleaner diesel models to North America in 2008 to cut into their business.

Photo by Steve Ahl/Ahl Motors