The World In 2400

Ezra Klein searches for a weak spot in Manzi's latest argument against a carbon tax:

Even if Manzi is right that the costs [from global warming:] are manageable into 2100 -
century, after all, is a long time for a human, but not for
atmosphere -- what does that do to our descendants who have to
with a scorching planet between 2100 and 2200? And then into 2300
then

I think Manzi's answer is that technology will save us by then. Andmaybe he's right. But maybe he's not...