Environmental science is an interdisciplinary field of study that integrates physics, biology, geography, ecology, geology, mineralogy and chemistry to examine environmental problems along with their impact on humans, and providing solutions to these environmental problems. Environmental studies is another field which is closely associated with environmental science, and it incorporates social sciences to understand the human relationships, perceptions, and policies towards the environment. Environmental science seeks to comprehend the physical, chemical, biological, and geological processes of the Earth. This knowledge is used to understand the different phenomena and solutions such as alternative energy systems, pollution control and mitigation, natural resource management, and the effects of global warming and climate change on the natural systems and processes of the Earth. The objective of this book is to provide an overview of the principles of environmental science. It will prove to be immensely beneficial to students and researchers in this field.