He's comparing AGW, which drives a trend, with weather-based events, which are noise around the trend. He conveniently cuts his analysis off at the year 2100, by which we'll all probably be dead. But he's probably right that the trend itself doesn't cause insurmountable problems by that point.

But what about the year 2200, or 2300? At three degrees warming per century, the earth looks like a pretty hostile place to live in a few centuries.

"A society grows great when old men plant trees in whose shade they will never sit", and all that...