Here is a great book called Witness for the Earth that is about a religious perspective on environmental protection or "creation caring". It is a great discussion book for environmental church groups. Go to the Amazon link below and check it out.

http://www.amazon.com/Witness-Earth-Coalescing-Religious-Environmental/dp/1453871934/ref=sr_1_6?s=books&ie=UTF8&qid=1290866089&sr=1-6