Energy is indispensable for development. There is critical need for a cleaner energy technology for sustainable growth in the modern times. This book discusses the sources of energy and the impact they have on the environment in depth with a special focus on renewable sources of energy like hydroelectricity, solar energy, wind energy, etc. It consists of researches contributed by experts from the field of environment and energy sciences. The aim of this text is to acquaint the readers with concepts like sustainability and effective environmental protection. It is ideal for environmentalists and researchers.