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It seems likely. 500 million years ago, atmospheric CO2 was hundreds of times higher than even the worst projections allow humans to create. CO2 eventually weathers into limestone and gets subducted under continental plates. Ultimately, geological activity renews the balance, and stops us turning into Venus.

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NPR article is "irreversible in 1000 years scale". Yes, things are different in million years scale. But even immeidately achieving zero emission today will not cool the planet, at least for 1000 years.

Basically it is irreversible on a human level timescale. Many generations of life on this planet are going to have to adjust to higher average temperatures. It's going to be (and already is really) a mini-extinction event. Unless we don't change course, then it might be a mass extinction.

There's the possibility of geo-engineering.

We can't even agree to stop causing damage. Agreeing to undertake a colossally expensive project to reverse the damage seems like a political impossibility. In 50 or a 100 years maybe, but not in the world as it is today.

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