the basic science is settled and what they are arguing about is if we are fucked or well and truly fucked
The second one sounds more satisfying to me... "well and truly" bespeaks passion and romance...
Sounds like someone is itching to play Geoengineer
He may be wrong about the specific effect of the aerosols but he does have a point: we're all already playing geoengineer and have been for a century or so.