nature
Pronunciation /ˈnāCHər/ /ˈneɪtʃər/
NOUN
1. The phenomena of the physical world collectively, including plants, animals, the landscape, and other features and products of the earth, as opposed to humans or human creations.
The key is that none of those items that you mention would exist without the “intelligence”of man being the underlying cause of them, yes, as a side effect of human overpopulation as a result of being able to bend nature to their own demands and uses. A beaver can build a dam based on instinct and it will have a local effect of flooding a relatively small portion of the countryside, and that is perfectly natural. But beavers would normally be unable to overpopulate even that area because they would be kept in check by various natural predators.
Humans, on the other hand, can and will cut down every tree, slaughter every buffalo, and burn every rain forest if they think that it will benefit them in any way. That’s not nature. That’s the DESTRUCTION of nature by using bulldozers, refined gasoline, manufactured weapons, etc.
I analogize humans to rats because they will eat almost anything and soil their own nest without regard for long-term consequences. Unless, of course, other humans use THEIR intelligence try to stop them from doing so in the name of SAVING nature. Unfortunately, in the long term, it is the destroyers who seem to win out. “Nature” normally won’t stop them. Nature is relatively defenseless against the predations of humans if they set their mind to it. Those are just the unfortunate facts.