It’s a cult.
This is a beheading for blasphemy.
Mass of the atmosphere is 5.15 X 10^18 kilograms contained in a volume of 4.2 billion cubic km. CO2 is 0.039% of the total gases in it.
The arrogance that human activity is responsible for such dire predictions on the massive scale of the earth is absurd. What comes closest to mind when I see these ridiculous claims are a bunch of Mayans in the jungle absolutely terrified of an eclipse and believing the world is ending.