Concern for the environment and the impacts of pollution have brought about the need to shift from the use and reliance on hydrocarbons to energy-power sources that are pollution neutral or near pollution neutral or renewable. Moreover, the impact of two hundred years of industrialization and surging population growth threatens to exceed the future supply of hydrocarbon power sources. Therefore, the implementation of green energy sources is surging. The Science of Green Energy presents technologies and techniques, as well as real world usage of and operation of today’s green energy-based applications. This practical book is designed to be used as an information source for the general reader, or for a course in energy, chemistry or in renewable energy engineering fields where green energy is becoming a key player. It is intended to fill a wide gap of missing information in published texts dealing with the green energy revolution currently in progress; it specifically provides information involving the many different sources of energy.