I met a traveller from an antique land, Who said — “Two vast and trunkless legs of stone Stand in the desert. . . . Near them, on the sand, Half sunk a shattered visage lies, whose frown, And wrinkled lip, and sneer of cold command, Tell that its sculptor well those passions read
Even if ALL human sourced carbon emissions ended today, the global warming feedback loops already in motion will end most life. Fossil records show that it has happened before.
The thing about unsustainable systems is that they are by definition unsustainable. Humanity has fucked around and now we are finding out.
fossil record show rich life at higher temps . alligators in wyoming and palm trees in canada
Until it goes even higher. The release of sub-permafrost and continental slope methane deposits will push it way past the balmy arctic stage before the feedback ends and equilibrium is regained.