Jesus tap-dancing Christ, 70 miles?! That's egregious even for a car commute! Even without doing the math, I'm pretty sure that your environmental savings from not eating meat is a rounding error compared to that kind of clown car habit.

If you can't find a home closer to work, you need to find a new job closer to home. Something's got to give, if not for the planet then at least for your own sake!