Part of the environmentalist divide is over the relationship between humans and nature. Do we operate from an ecocentric or anthropocentric one? Tolkien's heroes are "stewards" in the Chrisitian model: belonging to a hierarchy of care for Middle-earth, exercising dominion on behalf of nature. Ecocentric worldviews emphasize that humans exist within a system and must play a positive role.
On the surface, both ideologies favor care for nature. But they can result in divergent outcomes.