We’ve had 30 years to observe the accuracy of the predictions made by the 'CO2 controls the climate global circulation models' (GCMs).
The grossly inaccurate GCM predictions / projections / simulations support my belief that CO2 does not control the climate, and never has -- the demonization of CO2 by the anti-CO2 cult is junk science.
Of course any 100-year prediction can’t be falsified in a single human lifetime.
The coming climate catastrophe is always coming ... and will always be "coming", but will never arrive!
A wild guess of the climate in 100 years was never real science to begin with, because the causes of climate change are not known, and are still being debated.
There are no real climate models — just prototype models that have failed miserably to predict just ten years into the future.
We do have plenty of failed models — we don’t have real models of the climate change process that make reasonably accurate predictions.
There can be no real models until the causes of climate change are well known — and even then a model may only be able to predict the future climate if the causes of climate change are cyclical, rather than random.
Climate scientists want their wild guesses of the future climate to be accepted as real science!
An educated guess of the climate in 100 years would require, at the least, a thorough understanding of exactly what variables cause climate change -- without that knowledge, a climate prediction is just a meaningless computer game.
To predict the future climate, the variables that cause climate change would have to be cyclical, in a regular way that was predictable.
Even then, common sense should tell us that predictions of the future are very likely to be wrong, as they have been throughout recorded history.