Inert is not a good term to describe nature because it implies that nature is powerless. However, a good argument could be made for neutral.

Nature in general doesn't care whether you live or die. It can and has provided for our well being if/when we have known enough to take what we need. OTOH, nature won't give us this bounty on a silver platter, we have to take it and keep it and we may need to compete with other inhabitants of nature who are better suited.

Just as we can consider a salmon we catch in a stream to be part of what nature provides, the grizzly who's food we just took is also part of nature. Nature "in general" doesn't care whether the bear gets the salmon, we get the salmon or the bear gets us. Neutral is a good term.