Every country in the world is seeking new energy sources as alternatives to fossil fuels. For the best use of such resources, we need to know how much is available, what the limitations are and how to make efficient devices which will harness the energy in a practical, cost-effective way. This book gives quantitative answers to these questions, using basic alternatives and specialized engineering treatises and will be useful as a text for students of physics, engineering and chemistry and as a reference for practising engineers and scientists wanting a rigorous, applications-based overview of renewable energy resources.