Japanese building giant Taisei Corp is using techniques used in the construction of underwater tunnels in turbulent environments to revive local ocean ecosystems imperilled by climate change.

The company has used its own proprietary technology to place 600 mortar blocks on the sea bed off Miyakojima island in Okinawa Prefecture, in order to serve as seeding beds for coral larvae. While the placing of inert structures on the seabed to foster the growth of a life form as…