> overhaul our entire economies at ruinous cost

Reading this gives me a headache. Guess what will WAY be worse than that?

https://pbs.twimg.com/media/B5-lDJWCUAAwfya.jpg

Also most of the developing countries, those people like you like to point their finger at and use as an excuse to keep dooming yourself, your planet and most of all your children's futures, will be hit first and the hardest by climate change. And they know it. China is already coming around.