There is a climate change thread here in the Great Debate forum.

Possibly you missed the VMS post 1440620 in the More Tribal News thread.

It is lengthy but gives balance to myth and misconception.

"To claim that Indians lived without affecting nature is akin to saying that they lived without touching anything, that they were a people without history."

The purpose of this paper is twofold. First, it will put to rest the myth of a unique and romantic American Indian environmental ethic. Second, it will illustrate how American Indians used complex and evolving institutions to conserve scarce natural resources and to survive in a sometimes hostile environment. By institutions, I mean the traditions, rules, laws and habits that guided Indian societies. Though the actual laws and customs vary among societies, all societies have such institutions to guide them.