Hatin' on the Environmental Science, eh?
You're considered for both programs you apply to - if you apply to both Life Science and Environmental Science, you'll receive an offer for both individually regardless of the fact that Environmental Science would be your back-up. That's poorly worded, so I'll try to clarify what I mean. If you have, say, an 89% average and can obviously get into either program with that, the university won't simply offer you Environmental Science just because the admission average is lower.