Yes, but Venus has 93 times the atmospheric pressure of Earth, and it's overwhelmingly CO2.
Earth isn't likely to get a true runaway like that until the sun gets another billion or so years on the clock, and when it does it will be water vapour as the oceans are promoted to atmosphere.
What we're doing to ourselves is still bad, of course, but it's nowhere near that bad.
For temperatures not survivable by humans we're talking about a sustained wet bulb of >=36C
On whether it's probable, I'd lean towards no but I'm not qualified. The certainty that I read in the parent comment was mainly what I was pushing back against. On a re-read though it's much less certain (either edited or perhaps I massively misinterpreted it the first time around). Runaway implies positive feedback which is hard to gauge, was all I intended to say
Yes, but Venus has 93 times the atmospheric pressure of Earth, and it's overwhelmingly CO2.
Earth isn't likely to get a true runaway like that until the sun gets another billion or so years on the clock, and when it does it will be water vapour as the oceans are promoted to atmosphere.
What we're doing to ourselves is still bad, of course, but it's nowhere near that bad.
Is there a possible scenario for that on earth, that results in every place on earth having a temperature non survivable by humans?
For temperatures not survivable by humans we're talking about a sustained wet bulb of >=36C
On whether it's probable, I'd lean towards no but I'm not qualified. The certainty that I read in the parent comment was mainly what I was pushing back against. On a re-read though it's much less certain (either edited or perhaps I massively misinterpreted it the first time around). Runaway implies positive feedback which is hard to gauge, was all I intended to say