Well, I'll mull it over. I'd like to look at figures for atmospheric carbon in past extremely hot periods (or just annoyingly hot periods), and the modern rate of emissions. It seems lucky if industrialization has an effect that's perceptible yet harmless, that's a fairly narrow window.
It's been a slow steady increase in CO2 since industrialisation.
The atmosphere has become increasingly better insulated in the thermal energy spectrum .. albeit still losing a lot of heat to the outer layers and to space.
Basic back of the envelope thermodynamics tells the story - more trapped energy at the surface layer - land, sea, and near surface air becomes warmer across the globe and that warmth cascades through energy transfers.
For some it's confusing that warmth -> rising air -> inrushing colder air -> circulating air cells -> freezing conditions (just as fridges / freezers heat pump via air pressure).
The first significant paper on this was
Thermal Equilibrium of the Atmosphere with a Given Distribution of Relative Humidity (1967)
A great deal of key data (atmospheric makeup, sea tempreture records) came from hard nosed Cold War era research focused on nuclear weapons, sub tracking, and other such pursuits .. much of it "disguised" as environmental research (we listen to whales!) but not at all driven by a 'need' to invent and justify an AGW agenda (as some have claimed).
Sure, but it's not that lucky. You can't set your house on fire by adding more and more roof insulation, it's the same here. The greenhouse effect saturates, it's not linear https://www.scirp.org/pdf/acs2024144_44701276.pdf There's also lots of feedback loops. CO2 levels were much higher in the past but life thrived, it wasn't waterworld, it was just a lot greener. So it only sounds lucky because climatologists have claimed even very tiny changes can cause a crisis.
Remember, we're talking here about a gas that makes up 0.04% of the atmosphere. Water is a much more powerful greenhouse gas. CO2 wasn't measured directly before about 1960, but if you believe the ice core measurements it was about 0.02% in 1850. It would be a very fragile planet that could be tipped into disaster by a change of 0.02 percentage points in the level of a single gas.
There was the Permian–Triassic extinction event, the "great dying", where apparently the only large land animals to survive were the therocephalians and their prey lystrosaurus, and for both their survival seems to be due to burrowing. CO2 had hit 0.25%.
