hi,

m.sc in environment science is generally 2 years course program, this is an Interdisciplinary stream , has versatile work opportunity in environment, biotechnology, life science related domain. An environment science degree holders may work in following disciplines:

Environmental specialist.

Environmental technician.

Environmental science teacher.

Marine biologist.

Environmental chemist.

Wildlife biologist.

Microbiologist.

Environmental consultant

however it is quite difficult to predict whether you may get work opportunity in mumbai or not, it depends on the current recruitment vacancies, company rules, work position. so as a fresher you may have to relocate in the work area to get the job and work experience.