If I were a schill for big business, I'd be all, "Yeah yeah! Do it! Let's compensate by geoengineering!"
DO NOT DO THIS. If it works and you overshoot, you'll induce another ice age, which can happen in as few as a couple of years. Unlike moving in from the oceans over 100-300 years (a nuisance, and less damaging to human life than slowing technological advancement by massive intervention in the economy) an ice age will indeed, and actually, and rapidly kill billions of people.
Lik Willy Wonka, I will sigh and burble flatedly, "No. Stop. Don't do it." but the children won't listen.