Dear friend, thank you for your question. Your question is related to present day problem. We all know that our environment is degrading day by day, but we just discuss and do nothing. In this regard, I would like to appreciate you for your concern to the environment and you wish to make your career in environmental science.
To pursue career in environmental science, you have to study, 10+2 in biology, physics and chemistry. The your graduation should be in environmental science (BSc or BTech),, if you cannot make it, then you can pursue your graduation in botany, [biotechnology], [microbio