There's an ongoing discussion among some members of the Jesuit communities I've lived in over the kinds of foods we eat and how that impacts the ecology. For some, industrial livestock operations, where most of our meat comes from, are so destructive to the environment on many levels that the only responsible choice is to maintain a vegetarian diet. This choice becomes difficult in a religious community, where food supplies and meals are shared in common. The vegetarian must either abstain from part of our common meals, request that vegetarian options be made in addition to the regular meals, or maintain a separate shopping list and prepare their own meals. All of these options create dilemmas when living in religious community. Our common life and apostolic poverty don't always make independent meals a feasible option.
I came across an interesting article on 6 Baby Steps Toward a More Sustainable Animal Diet which proposes that you don't have to give up meat entirely to be a good steward of the environment:
The most common question I get about my new book , which comes out Tuesday, March 2,is, "Am I going to have to become a vegetarian after reading this?"
My answer usually throws people off.