[adaml_623]

Well I wasn't totally sure so I googled quite a bit and what with websites recommending 20 minutes, articles about deaths, discussions about achieving 45 minutes in a sauna, I would say that a few hours in a Sauna would kill you unless the temperature was very low by Sauna standards. I was originally going to suggest that the OP stand in an oven but thought that too crude.

Realistically I accept that this debate is not 'winnable' in any traditional sense. Even if the governments crack down on CO2, and the temperature drops back to non increasing fluctuations there will be no acceptance from some people who will always insist that it is/was a conspiracy the same as the moon landings and the UN. I suppose the only way that one side could convince the other is if the CO2 keeps increasing and the weather doesn't end up killing us all. Sorry for the digression.

[fsloth]

A sauna can be used as a steam boiler, then being plausibly lethal:https://en.m.wikipedia.org/wiki/World_Sauna_Championships#20...

I usually spend like an hour at 75 degrees celsius with some moisture. Which is totally non-lethal.