The world's oceans belong to all of us, but we aren't protecting to them.
The minerals sitting around on the bottom of the sea could help us to build the world's next generation of electric cars and solar panels. Managed properly, there could be more than enough fish to feed us forever.
But if we carry on the way we have in recent years, there is an alternative future - one where sea levels rise, causing untold costs; where fish stocks run out; where coral reefs die and the ocean's capacity to keep absorbing our carbon dioxide diminishes.
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