With easy-to-read text, full-color photos, and captivating graphics, this book examines the background, pros and cons, and future of renewable fuels. Readers will learn about corn ethanol, cellulosic ethanol, biodiesel, landfill gas, and methane digesters. These fuels, including E85 and soy biodiesel, are compared and contrasted with widely used fossil fuels. The process of turning grains into ethanol is broken down into easy-to-follow steps, and the role of ethanol in the carbon cycle is simplified in an illustrated diagram. Environmental topics such as pollution, greenhouse gas emissions, and global warming are also introduced. In addition, a colorful timeline highlights advances in renewable fuels. Informative sidebars, bold glossary terms, and an index accompany engaging text and interactive graphic elements.