New information, technologies and methods for availability assessment and the utilization of renewable energy resources are the core focus of this work. Included are introductory chapters on the energy situation and associated concerns. Resource assessments and the uses of solar energy, wind energy, hydropower, biomass energy, biogas and bio fuels resources towards generating electricity, thermal energy, and automotive power and transport fuels are examined in detail. The economics, storage, environmental benefits and promotion of renewable energy are discussed at length. Unique insights coming from the perspective of developing countries make this a unique contribution to this important field of work. This text will be of benefit to researchers, manufacturers, policy makers and planners.