Ugh, I shouldn't feed trolls...

1) AGM has hit the gold-standard of proof, it's not an open question at this point, and CO2 is the primary driver along with other GHG [1]

2) What exactly are the "potentially disastrous" consequences of going back to 300ppm, roughly where we were for 10k years?

[1]https://www.reuters.com/article/us-climatechange-temperature...