Abstract and Academic Scope
This chapter introduces the structure and composition of the environment with emphasis on the atmosphere, hydrosphere, lithosphere, biosphere and their interconnected chemical processes. It explains how environmental compartments interact through natural cycles, chemical exchanges, energy flow, water movement, soil processes and biological activity. The chapter provides a conceptual foundation for understanding pollution, climate change, resource quality, ecological balance and environmental sustainability. It is designed for academic readers who need a clear theoretical framework before studying advanced topics in air chemistry, water chemistry, soil chemistry, toxic chemicals, waste systems and environmental risk.
