is there a thing like that only after master's degree(environment related subjects) you get promoted fast??
No dear, it only depends on your capabilities to perform well and prove yourself. Yes it's somewhat true that at the time of hiring the Master's candidates get a bit more priority over the Bachelor's ones but it varies according to the need of the recruiter. So promotion is not at all dependent on the grade of your degree, work hard and fill up the requirements stated by the company.
Good luck !! All the very best for your future