XPRIZE designed a prize for coral restoration several years ago (discussions from that prize design are here), but unfortunately it hasn’t been funded yet. I think it’s worth reintroducing the topic of coral reefs here.
Half of the world’s coral reefs have died. The rest are under threat due to increased ocean temperatures and ocean acidification. Recent climate reports by the UN estimate we are on course to lose 70 to 99 percent of all coral reefs.
These vital ecosystems help protect coastal communities from storms and tsunamis and provide habitat and shelter for 25 percent of the world’s marine species.