May not be possible with modern deposits but I don’t think we are 100% sure of that, and you asked.
We could also probably burn enough carbon to send CO2 levels up where they would cause cognitive impairment to humans if we really didn’t give a damn. That would be upwards of 2000ppm. We probably have enough coal for that if we decide we don’t need Alaska. Of course that would be even more of a species level Darwin Award because we’d see that train coming for a long time.
Interesting, I have some vague recollections off hearing about this.
But according to your link, IPCC says it's not a plausible scenario in the medium term. And I'd say that even 8 degrees of warming wouldn't be enough for extinction or end of human civilization. But there it could be double digit percentage of human population dying.
https://en.m.wikipedia.org/wiki/Clathrate_gun_hypothesis
May not be possible with modern deposits but I don’t think we are 100% sure of that, and you asked.
We could also probably burn enough carbon to send CO2 levels up where they would cause cognitive impairment to humans if we really didn’t give a damn. That would be upwards of 2000ppm. We probably have enough coal for that if we decide we don’t need Alaska. Of course that would be even more of a species level Darwin Award because we’d see that train coming for a long time.