Has world oil output peaked? Recent price spikes and dwindling reserves have spurred fears that we are fast approaching the critical tipping point that will trigger severe global economic depression, political instability, and human suffering. Today 95 percent of global oil is consumed for transportation, and other alternatives are distant possibilities at best. We need a solution now, one that will pave the way to a saner, more sustainable energy future without massive reinvestments in infrastructure and technology transfer. We need biodiesel. A crop-derived liquid fuel, biodiesel can be made from a wide range of renewable, locally grown plant sources--even from recycled cooking oils or animal fats. The technology is simple and available today, and the benefits of biodiesel are enormous, as both a cleaner-burning vehicle fuel and a source for residential or commercial heating. Greg Pahl?s essential new book explores the history and technology of biodiesel, its current use around the world, and its exciting potential in the United States and beyond. While biodiesel is not the answer to all our energy problems, it is an important step in the long overdue process of weaning ourselves from fossil fuels.