This book is intended to help researchers develop a basic knowledge of energy industry and its role in the economy, including operation of oil refineries, natural gas and petrochemical plants, coal gasification, electric power plants, and global warming potential. The book also presents the key metrics of energy activities in addition to quantitative methods such as statistical analysis, linear programming, and financial techniques that can be used to evaluate energy issues and to inspire new approaches. The book contains a series of qualitative and quantitative questions and answers to reinforce the reader's learning of each chapter.