Environmental chemistry is the scientific study of the chemical processes occurring in the environment, including the interactions of air, water, soil, and living organisms. It focuses on the sources, reactions, transport, effects, and fates of chemical species in the environment. The subject examines both naturally occurring chemical phenomena and those resulting from human activities, particularly industrialization, urbanization, and the use of synthetic chemicals. Its scope is vast, as it encompasses pollution studies, environmental monitoring, toxicology, waste management, and sustainable development. Environmental chemistry provides the foundation for understanding the chemical basis of environmental issues such as climate change, acid rain, ozone depletion, and water contamination, and for developing methods to mitigate their impacts. The scope of environmental chemistry is interdisciplinary, combining aspects of chemistry, biology, physics, and environmental science. It addresses problems like air pollution caused by gases such as carbon monoxide, sulfur dioxide, and nitrogen oxides; water pollution due to heavy metals, pesticides, and organic pollutants; and soil degradation from acidification and salinity. It also includes green chemistry approaches that promote environmentally friendly technologies,