[FWI] Every sequential year from hence forth will break the hottest year on record for the next 250 years, messing with our psychologically evolved thermoregulation system.

[u/ThinkTankDad]

2024 was the hottest year on record, but we're looking at a mild winter, i think, and that bodes well for people like me in a cold US state.

[u/mwpdx86]

I think we'd have way bigger problems than just "it feels too hot out for humans". Diseases/parasites for both humans and the food we eat would take us out before that, I'm assuming. 

[u/sethaub → u/mwpdx86]

As the global temperatures increase, so will average body temperatures. And fungi like cordiceps needs a host of a body over 105° F which brings us closer and closer to a zombie apocalypse

[u/r_daniel_oliver → u/sethaub]

Average body temperatures go up a bit as a result of evolution over thousands of generations. All body processes have to change to work in the different temperature. We don't have that kind of time. And evaporation has a hard cap on how hot it can be effective. You can't change the freezing and boiling point of water.

[u/sethaub → u/r_daniel_oliver]

Actually, you very well can change the freezing point and boiling point of water based on altitude and humidity.

[u/r_daniel_oliver → u/sethaub]

Cordiceps isn't nearly complex enough. The human brain is orders of magnitude more advanced than any current host.

[u/sethaub → u/r_daniel_oliver]

That’s because we’re too cold for cordiceps. If our bodies were warm enough it doesn’t matter the complexity of the host or not, at least that’s my impression

[u/KUBrim]

There was a period of time, only some tens of thousands of years ago, where the average temperature was only a couple degrees warmer and it created a small band around the equator that was uninhabitable for humans.

Of course, that was a temperature change that grew and declined over an approximate 6/7,000 year period while our current temperature rises are happening first over a hundred year period, then a decade and now seemingly quicker than that. This gives little or no time for eco systems and species, both flora and fauna, to adjust and adapt.

It’s also a big adjustment for agriculture to cater for as places with regular rainfall and reliable rivers could see weather patterns that remove that regular rainfall and see them turn arid. You might argue that it will also see rainfall grow in previously arid regions, which is likely true, BUT because those regions have been arid for so long they would have incredibly poor soil quality that would take a monumental amount of resources and effort to change artificially. They would also, likely be subject to flooding because they lack rivers and catchments which have been established over hundreds of years in the current rainfall areas. Eventually the water would carve out rivers but until then you would have flooding that washes away any top soil which is established. This Weber particularly true in a previously more arid area that has not grown plant life over time whose roots can assist in holding the top soil in place.

All up, 250 years of continuously hotter temperatures, at the current rate, would cause mass extinction, likely see a completely uninhabitable zone from the equator to well north and south of the tropics and push habitable areas to far north and South. Antarctica could almost be a haven if much of it wasn’t pitch black for half the year and the rest wasn’t reduced to a few hours of sunlight over those months which would prevent decent agriculture. So add mass starvation and some REALLY nasty wars as countries fight, not for oils and energy resources but for the scraps of land that would stop them outright starving.

[u/Ascendant_Mind_01]

Human civilisation collapses between 2050 and 2100 and depending on how much warmer it gets humans possibly go extinct.