New Zealand's first-ever climate adaptation plan includes the possibility of moving some communities to higher ground, but doesn't explain how much the changes will cost and who will pay.

Guyana, one of South America's poorest countries, is under severe threat by rising seas. That had made it a champion of climate action, but it all changed when ExxonMobil found oil off its waters.

Research published this week finds that home sales volume and prices have declined in coastal census tracts vulnerable to sea level rise, relative to coastal areas less threatened by climate change.