The Calera story is still very much in progress. It remains an open question whether the cities of our future will be built underwater by virtual coral reefs on a diet of factory exhaust. It sounds fanciful when described that way, of course, but no more fanciful than the idea of the Great Barrier Reef would have seemed a billion years ago. Nature has long built its platforms by recycling the available resources, including the waste generated by other organisms. Two things we have in abundance on this planet right now are pollution and seawater. Why not try to build a city out of them?
