This book gives an overview of energy resources based on fuel and renewable energy from the perspective of environmental mitigation and human health aspects. The first part of the book describes fuel energy based on fossils like oil, natural gas, and coal and further discusses its impact on our environment like more carbon generation. It also includes a discussion on the policies set up by different world organizations and future of the fuel energy. The second part of the book looks into renewable energy sources like wind, solar, geothermal, and hydropower, which are considered green energy sources and minimize the environmental impact. The book caters to academics, researchers, industry practitioners, and government policymakers who are interested in cleaner and greener energy sources.