Environmental Science is the study of the interaction between physical, chemical and biological components of the environment with focus on pollution and impact on biodiversity and sustainability.  Environmental Science involves a focussed application of many other fields of science, engineering and management and therefore it is related to Biology, Earth Science, Chemistry, Physics, Engineering and Social Science. It is generally offered for study as an M.Sc. programme and, therefore, a degree in any discipline of science is a prerequisite for admission. However, a few institutions offer the B.Sc. course in the discipline. After Plus Two with good marks in science, you can go for a B.Sc. course in Environmental Science or Botany, Zoology, Chemistry, Physics, Geology, Microbiology, Biotechnology and so on. After B.Sc., you can choose the M.Sc. course in Environmental Science and further do research in the field leading to a Ph.D. You can check out the following link for more details regarding environmental science CLICK HERE