Energy is required to do the most basic to the most complex actions in today's world. Exploitation of resources can cause severe energy crisis in the coming years. Therefore, sustainable use of energy is the need of the hour. The different alternatives to fossil-fuel based energy are hydroelectricity, wind energy, solar power, bioenergy, tidal power, geothermal power, etc. This book will provide knowledgeable insights into the field of sustainable energy and its positive impacts on environment. Some of the diverse topics covered in it will address the varied branches that fall under this category. As this field is emerging at a rapid pace, the contents of this text will help the readers understand the modern concepts and applications of the subject. Students, researchers, experts and all associated with sustainable energy and environmental conservation will benefit alike from the book.