Comprehensive Guide to Environmental Science provides an in-depth exploration of the intricate relationship between humans and the environment, emphasizing the urgent need for sustainable development. From the earliest conservation values embedded in ancient scriptures to today's global challenges like pollution, biodiversity loss, climate change, and ozone depletion, this book highlights the critical importance of environmental awareness and action. Focusing on the physical, chemical, biological, and social processes that shape our planet, this guide equips readers with essential scientific knowledge about ecological functions, biodiversity, water resource management, pollution control, and sustainable energy practices. It also addresses the complexity of global environmental issues, emphasizing international collaboration for solutions. Ideal for students and educators, this book bridges the gap between theory and real-world applications, fostering a deeper understanding of how to protect and sustain our planet for future generations.