First nations in Canada used to burn the prairies. That's what helped feed the millions of buffalo that used to exist here. Technically those herds weren't 100% natural. People helped with fire, over the span of centuries.

I don't know how much people are changing things, and how much is natural, but I'm sure it's a combination of the two causing changes. People are much like an active volcano, but more like slow and steady rather than a massive burst. Still enough oxygen though, because you can't have fire without it. Fire seems quite common these days. Is anyone measuring oxygen? More of that stuff and this entire place will burn, which in turn helps create a balance again. Crazy how that works, when you think about it.

Pure poison. Created in labs. We don't need that stuff killing everything. Drugs in our water supply because they get flushed? Well that's what you get for drinking out of the toilet I guess.