With the spectre of oceans gobbling up available land – just ask the good folk of Tuvalu – could floating communities become a reality?
In some parts of the world people already live above water, not land.
There are fishing villages in Vietnam, the Philippines, Malaysia Indonesia and Hong Kong where you can see structures on stilts over the ocean.
But for most of us, living means living on land.
Could a movement known as seasteading change that?