[lsd5you]

My god, I know we can't qualify absolutely everything we say, but I feel like you need some error bars on those predictions. Actually that is an understatement. It is wildly speculative to talk about GDP proportions and technological solutions in 80 years time.

[sien]

Fair enough. Double it. 1.2% of GDP.

The cost benefit calculations for global warming are similarly wildly speculative.

But it puts limits on the cost in 2100 which is really interesting.