Environmental science integrates biology, chemistry, geology, and social science to understand the interactions between humans and natural systems. It provides the knowledge needed to address pressing global challenges such as pollution, deforestation, and climate change. Fundamentals of Environmental Science offers a comprehensive introduction to ecological processes, resource management, and environmental policy. The book discusses energy systems, biodiversity, and environmental sustainability, emphasizing both global and local perspectives. It also explores the role of science in guiding conservation and sustainable development. With its interdisciplinary approach, it serves as an essential foundation for students and practitioners seeking to understand and protect Earth’s environment.