I don't really understand what point you're trying to make. Yes the planet is doomed sooner or later. But I'm talking about nature as in trees, animals, etc. The natural eco-system. And it existed and evolved and adapted naturally long before humans and will continue long after we're gone.

In philosophy there is a debate regarding the meaning of the word nature and if humans should be considered a part of it, and I see the points, but that's a different discussion.