Reef like all living things live and die! There is a bell curve and that says at any given time 1/3 of the reef is new, 1/3 is middle aged, and 1/3 will be dying and that is life! It is called a cycle! We can document the cycle and be good stewards to our environment as to promote husbandry and the reef as an asset not damaging it with anchors and man mad effluent! But the ocean won't even remember Mankind in the scheme time! In less than 250000 years the moon will leave orbit and there will no longer be tides! So then what? Oh the lefties will figure out it was our fault and taxes us to save the planet! LOL