Thanksgiving, while an ecumenical holiday, is a great time to consider the Jewish principle of baal tashchit (do not waste). There are many things you can do to make your celebration of this holiday more earth friendly.
Reduce, reuse and recycle as much as possible: Try to buy only as much food as you need and look for food that either has no container or that has a container that can be recycled. Plan to compost any non-meat food items that can't be eaten (such as carrot peel) or that have to be thrown out after the meal. Also plan to use reusable cloth napkins ...