20m is not catastrophic at all. Maybe the elites buying beach front properties didn't get the memo?

I live well above that and I'll gladly be closer to the sea.

We are lucky to live in such a time of heat. Actually that's the main reason so many of us CAN be here in the first place. In reality world what we shall fix is pollution and co2 isn't one. What we need is abundant, extremely cheap energy.

But don't fret, the sun will teach you a lesson or two...