Helen CzerskiThe problem with a lot of ocean "exploitation" is that it's like mining a human for calcium. Yes, a human body contains ~1kg of calcium, and you could take it out, but it's already *doing* quite a lot of useful things, and the human has far more potential to help you if you leave the calcium alone.
Sisyphus with a Hat@helenczerski Exactly. Also, as opposed to your average land based money, sea mining is very widely spread. Most mines' surface footprint is 1 or 2 square kilometers. Mining the seabed, if it happens, will have a massive footprint, and therefor the environmental management of the activities could become an impossible task.