“...the effect on earth would be 900 times as much. That is, the oceans would boil. Boil off.”
Don’t laugh, this is a serious comment to yours...our greenhouse gasses protect us.
That’s right. We have a dynamic feedback system that holds weather in a fairly narrow range roughly corresponding to conditions necessary to life as it is found on earth. That’s part of it; Hoagland makes reference to other effects, but since he doesn’t have sufficient techincal background he hasn’t explained what he talks about.