"If humans 'tamper with Nature at our own risk' but at the same time you insinuate that humans are just another part of nature, nothing more, then how can we tamper with it?"
I've read your question about a dozen times now, and it still doesn't make any sense. Maybe I'm more tired than I realize.
If armadillos could create atomic bombs, an endless stream of poisons aimed at the environment, and create lambs from moldy cheese and toenail parings, they would neither be part of nature NOR negatively affecting it?
Do we live in a vaccum and I haven't noticed???
Sue