It seems that you have a feeling that the more number of degrees you have, the better will be your career prospects or you are toying with too many options. It is better to have a clear objective for your career and work towards that instead of dilly dallying with too many options. You should also realise that industries and institutions which employ Environmental specialists do not make much difference among these courses. There are three types of occupational streams in Environmental Sciences 1) Environmental Engineering, 2) Environmental Sciences, 3) Environment Management. Environmental engineers find jobs in manufacturing industries, engineering consultancy organisations, companies involved in manufacturing of environment control equipment and environmental consultancy, research institutions, and Government agencies. Environmental Scientists generally get jobs with research institutions and Universities, environmental consultancy organisations, Government agencies and Non-profit organisations involved in this sector. Environmental Management graduates mostly get jobs with NGOs, and manufacturing industries.

You can become an Environmental Engineer either by studying BE/B. Tech in Environmental Engineering or by studying ME/M. Tech in the same discipline. You can study ME/ M. Tech in Environmental Engineering after a degree in any branch of Engineering. It is not possible to do ME/ M. Tech after M. Sc. in Environmental Science/Wildlife Science. Many companies also take BE/ME in Civil/Mechanical/Electrical Engineering candidates and place them in Environmental Engineering jobs.

To become an Environmental Scientist, you should at least have a M. Sc. in Environmental Science or a related course. To do a M. Sc., you should have a degree in any related Physical/Biological science subject like Physics, Chemistry, Zoology, Microbiology, Life Science, and Biochemistry. You can also have a M. Sc. in Zoology/Biomedical Science/Wildlife Science.

To get into Environmental management, you should at least have a Post graduate degree or diploma in Environmental management. To study the Post graduate course, you should have a Bachelor degree in a related Physical/Biological Science subjects given above or a Bachelor degree in Environmental Management.

You can do an M. Phil/ Ph. D in Environmental Science after having a M. Sc. in any related Biological/Physical Science course described above. Distance education courses are equivalent to regular courses. But if you want to get an entry level job, it is better to do a regular course. Distance education courses are better for those who are already employed in the sector and want to acquire higher qualifications for career development.