You're missing the forest for the trees The coral reef thing was more of a marketing campaign, it's beautiful, it dies quickly, you can see it almost live, but

You're missing the forest for the trees The coral reef thing was more of a marketing campaign, it's beautiful, it dies quickly, you can see it almost live, but all in all it doesn't matter much Ocean acidification, massive change in wind and ocean currents , the permafrost melting, loss of albedo in the poles, &c. These are all much bigger problems we can't deal with at all, it'll start self reinforcing loops we can't even pretend to understand yet