Green energy refers to the use of renewable sources for energy production. Some major technologies related to green energy are wind power, bio energy, hydropower, photovoltaics, etc. The topics included in this book on green energy are of utmost significance and bound to provide incredible insights. It will also provide innovative topics for research which interested readers can take up. As this field is emerging at a rapid pace, the contents of this book will help the readers understand the modern concepts and applications of the subject.