Yes, you are eligible to pursue MSc Environmental Science after you have completed your graduation in BSc Agriculture. MSc Agriculture requires around a minimum of 50% aggregate marks in BSc/BSc (Hons).

Other points regarding MSc Environment Science -

• Duration - 2 years
• Admission process - Merit based (performance in entrance exams)
• Tuition/Course fees (Range) -  Rs 20,000 to Rs 3,00,000
• Good Universities offering MSc Environment Science - Savitribai Phule Pune University, Panjab University, Banaras Hindu University, Sri Venkateswara University, Acharya Nagarjuna University

To get a complete list of Top MSc Environment Science colleges in India, you may visit the link - Top MSc in Environmental Studies Universities in India 2022 – Courses, Fees, Admission, Rank (careers360.com)