Despite weather balloons scanning the skies for years for the telltale “hotspot” warming pattern that greenhouse gases would leave there’s not even a hint of it occuring.
There was strong evidence in ice core samples, but the latest more detailed data turned that theory inside out.
Instead of carbon pushing up temperatures, it is now understood that temperatures have gone up before carbon dioxide levels. On average 800 years before. This totally threw out the theory of cause-and-effect .
Temperatures haven't risen.
Emperical evidence from satellites circling the planet twice a day show that the world has not warmed since 2001. While temperatures have been flat or falling, CO2 has risen. The computer models don’t show this!
CO2 is already doing almost all the warming it can.
Having twice as much CO2 being added to the atmosphere doesn’t make twice the difference. The first CO2 molecules are important, but extra ones have less and less effect. Carbon levels were ten times as high in the past but the world still slipped into an ice age. Carbon today is a bit-part player.