We have two choices in predicting the future climate:
(1) Actual experience with global warming since the mid-1970s, and
(2) Predictions of future global warming at a much faster rate than in the past -- dangerous warming, unlike harmless warming in the past.
Analysis:
(1) Seven billion people have experience with some, or all, 45 years of the past global warming.
That warming was harmless, at worst, if you consider the locations with the most warming -- colder areas in the upper half of the Northern Hemisphere, with most warming in the six coldest months of the year, and most warming at night -- the warmer winter nights in Siberia are good news.
Add the greening of our planet from more CO2 in the atmosphere, and that is additional good news.
In summary ACTUAL global warming has been beneficial.
No one was harmed.
(2) Predictions of a coming climate crisis started with Roger Revelle in 1957, according to my research.
We have heard these "coming climate crisis" predictions for the past 64 years.
But there is no crisis.
The current climate on our planet is the best climate for humans, animals and plants in over 300 years, since the cold 1600s.
It does not make sense to continue to believe in "coming climate crisis" predictions after that prediction has been wrong for 64 years in a row.
It is extremely difficult to predict the future,
So far, the record of accurate climate predictions is near zero.
SUMMARY:
In the past 45 years we had rising CO2 and harmless warming.
There is no proof CO2 caused all of the warming, but let's assume it did, for now.
In the future, we are told the same rate of rising CO2 will cause much faster global warming -- dangerous warming, not harmless warming.
We are being told that the same CO2 inputs will cause completely different temperature outputs.
Expecting different outputs with the same inputs meets the definition of insanity.