Future Oil The Cargill salt ponds south of San Francisco. Courtesy of Cargill Inset: Courtesy of Solazyme Biofuels made from algae are the next big thing on the alternative energy horizon. But can they free us from our addiction to petroleum? By Bob Grant ear the southern horn of San Francisco Bay, hectares of shallow ponds the color of blood, pumpkin pie, and murky emerald stretch out across crusty salt flats in an aqueous patchwork.
