Sadly, I think we've already done it -- as of 2000 it was, from a physics point of view, impossible to stop.
The most we can do now is slow the rate of acceleration.
And if we don't achieve that by 2030, we've got Buckley's Chance of avoiding mass starvation, wars, migrations and extinctions across the planet.
It's already started happening.
And because it's a physical feedback loop, the momentum is extremely hard to slow.