Following a global energy overview, this book describes clean and alternative methods of producing liquid fuels, crude oil, syngas, and methanol from coal, coal slurry, natural gas, resids, oil sand bitumen, and oil shale. It details the chemical reaction mechanisms, biological processes, and unit operations for converting corn, lignocellulosic materials, and biomass into alcoholic fuels. It also covers the processes and thermodynamics of converting various waste materials into energy. The final chapters discuss the science, benefits, and applications of geothermal energy, nuclear energy, and fuel cells.