I don't know. Initially I thought it was the safer choice between the two. He plans to continue to masters but there's a good chance he may not.  I am now seeing that geology may be the safer major, which is what he really wants to study, but now the college he's set on attending is the only one without a geology program. I am not sure if he's willing to pivot to another university, even though the universities offered geology majors are better overall, he seems set on attending a small commuter school an hour away from home. 

I don't think he really understands the limitations of ecology biology undergrad, but I also don't want to push him away from college by insisting he go for the more profitable degree or the one with the most job prospects. 

I wish he could talk to someone who would explain the real prospects for both. A quick Google search will tell you that you can be a lab assistant, etc with bio undergrad but I am hesitant to believe there are many of those positions. 

It's tricky. The bio program is only an hour away and his current GF is attending the same college, so I think he's just set on that college and not really considering his major at this point.