Elements of Environmental Science is an easy approach to learn complex environment . The book is useful for everyone studying and interested in understanding of natural Environment. It covers the entire dimensions of environmental science, providing concise, explanation of various processes and human impacts on environment. The natural earth, together with all of its countries and people is complex and human activity can have unexpected consequences that are hard to reverse. The study of how physical and biological processes maintain life, and how humans affect nature, requires a broad interdisciplinary approach. Major current environmental problems of present era may include climate change, pollution, environmental degradation, and resource depletion etc. Environmental problems and their associated solutions typically involve social, political and economic aspects for which common man must be aware of. That is why the dedicated learning of environment is important. It is only by understanding how the world works that we can begin to tackle some of our stomach pressing problems. Environmental science is a vast discipline. Thus the book attempts to deal scientific advancement in the field of environmental science and has been divided in 7 chapters seeing the nead of UG and PG students of Microbiology, Biotechnology, Botany and Environmental Science students. The book deals the Multidisciplinary Nature of Environmental Studies, Natural Resources, Ecosystems, Biodiversity and its conservation, Environmental pollution, Social issues and the environment and Human population and the environment.