People do not often think about how much humans depend on the world’s oceans. Oceans regulate the climate, maintain a livable atmosphere, and break down natural wastes. According to marine biologist and conservationist Carl Safina, “Without an ocean, this planet would merely spin unnamed three orbits from a star, its browned-out face its own sterile moonscape.” Nevertheless, people treat the oceans as if they were inexhaustible both...