Hi aspirant,

The best i can suggest is choose any coaching institute that your prefer for gate environmental science and engineering but the final output  has to be from students end and not from any of the coaching institutions choose anything and stick to what you want to do and excel in your field and fulfill your dreams.

if you have interest  in pursuing M.tech IITs is the best option that you have through gate. preparing for gate not only helps  you to crack gate instead it helps in cracking many state and national level exams