The renewable energy resources have been used for thousands of years in the past, but for purposes a little different from the production of electricity. As the oil prices are rising consistently and the world is facing global warming problems, humans must consider the use of other sustainable methods to fulfill their electricity requirements. The 3 W’s of Renewable Energy focuses on three different aspects of renewable energy. What is renewable energy? Why we need Renewable energy? And where does it come from? It provides a comprehensive overview of the principal renewable energy resources including solar thermal, biomass, tidal, wave, photovoltaic, hydro, wind, and geothermal energies and explains the technological prospects underlying each resource, and its impact on the environment. The book examines the history, facts, current statistics, and the future prospects of each of these renewable energy resources in detail.