The book, "Essentials of Environmental Studies" is a very nice attempt on the environment. A neat and clean environment is body guard of the human health. Therefore, it is the prime duty of every citizen to keep the environment in a very good condition. Keeping this in view, the present book has been attempted to write in a lucid and very simple language. It is earnestly hoped that the present book will certainly serve a great cause to gather a sound knowledge and the ways to save the same.