Dear Sourabh,

     I heartfully appreciate your interest towards Bio engineering and environmental engineering and I'm here to help you regarding your query !!

Bio Engineering :

    It can also be called as Biomedical engineering. It covers tge topics such as genetics, physiological systems and health care as well. You'll also study about DNA, RNA processing, membranes and many other related stuff. The most common job roles after this degree is pharmaceutical Engineer, medical scientist, etc.., The average salary package for these roles will ve around 80k dollars.

Environmental engineering :

     This branch of Engineering mostly deals with nature and use of some principles to control environment naturally and controlling global warming, pollution, etc.., As it is benifical to Human beings. You mainly study about the Chemistry, treatment methodologies, sedimentation, etc.., The graduates hailing from environmental engineering background will have a lot of opportunities as well.

Hope this helps !!

Best wishes !!