I’m mean life on Earth, obviously. No one is saying that the planet is going to explode or disappear or anything like that. We’re talking about the climate, and life that depends on that climate.

And before you start coming at me with some “but but such and such life will still…” I’ll clarify again that there is a matter of scale here. A very large number of species that have been around for a very long time will soon be extinct (many have been lost already). So although we might still have mosquitos and jelly-fish for a long time to come, a lot of the complex life that is currently enjoying a comfortable and otherwise-sustainable life on Earth will no longer be able to do so; because of us. That’s what I’m referring to.

Yes, humans have does this to ‘ourselves’, but we are nowhere near the worst effected life in this situation. In fact, most of the ill effects on humans are just knock-on effects from other life failing. (In particular, reduced capacity to grow food is likely to be a problem for humans.)