Which risk increases when accelerating thaw of sub-sea permafrost releases methane hydrates?

💡 Explanation

When sub-sea permafrost thaws rapidly, methane hydrates destabilize via clathrate dissociation because warming reduces pressure and ice structure. The process causes slope failure, leading to landslides, not other listed changes. Therefore, slope destabilization dramatically increases, rather than salinity, canyons or depleted oxygen which require oceanographic or biological mechanisms.

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