Environmental Studies is an essential textbook for a new generation of engineers innovating within planetary limits. Moving beyond traditional descriptions of ecosystems, this comprehensive edition equips readers with critical analytical frameworks like Materials Balance, Life Cycle Analysis, and Circular Economy principles. Aligning fully with major technical university syllabi, the book reframes environmental knowledge as a core professional competency. Students will explore Green-Tech frontiers, including Green Hydrogen, E-Mobility, and Sustainable Design?learning to view environmental constraints as catalysts for innovation. Whether designing infrastructure, developing materials, or shaping energy systems, this definitive resource provides the strategic insight to turn sustainability from an aspiration into a precise engineering specification.