There are so many leaps of (il)logic in the CAGW position.
From warming to assuming CO2 did it -- despite warmth preceding CO2 rise.
From assuming CO2 did it to claiming humans increased CO2 levels -- despite long term warming trends forcing CO2 from the oceans up to hundreds of years later.
From assuming human CO2 is changing the atmosphere to demanding impossible, mass-murderous reductions.
From assuming CO2 causes warming to claims of inevitable and imminent disaster -- despite long historical precedent showing warmth benefits civilization, and cooling cripples it.
From assuming CO2 cuts would be beneficial to trying to price it out of the market -- despite own projections showing the best case result of 5 yrs delayed warming by 2100.