Hello Aspirant!

As Environmental science incorporates many aspects of Life Sciences in it, you can appear in CSIR-NET Life Science. But you will have to do a lot of extra hard work for CSIR-NET exam preparation apart from completing your post-graduate syllabus. The syllabus varies largely. If you are willing to pursue M.Sc. in Environmental Science, you should go for UGC-NET Environmental Sciences keeping in view the syllabus. It will be more helpful to you as per my knowledge.

I hope this answer will help you.