Is 'deep-sea mining' a euphemism for 'releasing methane hydrates'? Because that amounts to, releasing sequestered carbon with a potential to exceed the world's

Is 'deep-sea mining' a euphemism for 'releasing methane hydrates'? Because that amounts to, releasing sequestered carbon with a potential to exceed the world's oil supplies by 6X. And a lot of it will be incidental methane, which is worse than simple CO2 by some multiple?