Can a enviromental studies major do the same postions as a environmental scientist?

I'm about to start my junior year at baylor with a 3.5 gpa. I am double majoring in BA environmental studies/poly sci with a minor in Spanish. I was happy and confident that this would get me a job but I keep hearing that BAs are pretty much us eless nowadays. Should I change to bs environmental science? If I do I would prob delay my graduation by at least a year and would only be able to do the one degree. Additionally, my gpa would prob plummet to >2.5. I suck hardcore at the math that would be needed. And my exit loan amount would prob grow from a expected $35 to about $60 grand. The way I am, I see law school as a faint possibility if I could raise my gpa. With the ES I see...well don't know what but I pay for it in time,money and GPA. So tell me can I work the same jobs as the e. Science or have I just been taking the same classes as them to only have my degree dismissed as useless in the real world?