[Ann Archy]

Good!! So can MAN change NATURAL CYCLES?? The Godless Leftists think they can!!

[GingisK]

If man were to wage all-out nuclear war, we would indeed change the natural cycles of this planet.

So, is there an interaction intensity somewhere between "we're doing nothing" and "all out nuclear war" that would change natural cycles? Probably. Have we reached that with our CO₂ emissions? Probably not. I suspect the CO₂ emissions are not coupled to the observed climate changes.

The earth is a physical thing that operates within the laws of physics, even if we don't know all of the laws of physics. As such, the earth will respond to sufficiently large upsets in its environment. It isn't even slightly sensible to assume we can't kill of all life on this planet in some spectacular manner.