General Studies (GS) carries significant weightage, and cannot be left for last minute preparation in ESE exam. IES Master books on General Studies are tailored to the psyche of engineering students aspiring for UPSC ESE Prelims exam. The revised and updated edition of the book Basics of Energy & Environment builds upon your understanding of the complexities in addressing environmental issues, bit by bit, through detailed diagrams, natural cycles, analysis, linkages, and statistics. Starting with the basic definitions of the fundamental units of the environment, the book builds upon the complex web of ecosystem and ecology. Further, it goes on to map the ecological depletion, change in climate, and its impact on the various environmental processes. Basing on the belief that illustrations speak louder than words, and figurines communicate faster than complex wordy pages, the IES Master books comes crisp, compact and exact, accompanied by a myriad of illustrations. The book Basics of Energy & Environment structures the concepts in a broader perspective keeping in mind the applied knowledge required for top engineering professionals, along with 215 plus objective questions for self-practice. IES Master Publication makes sure that all its books are fully revised and updated annually so that every year students get the best ESE reference books.