There has been an emphasis on using renewable energy resources worldwide for addressing the emerging energy crisis and preservation of global ecosystems. This book brings forth some of the most innovative concepts and elucidates the unexplored aspects of this field. The topics included herein are monitoring carbon emissions from different sources, climate variability, evaluation of various fuel and energy sources and their impact on environment, etc. The book is aimed at providing a comprehensive understanding of the field to the students and researchers engaged in the field.