So what risks would a methane hydrate-berg pose? Would it proceed to blanket huge areas with gaseous methane near the ground/sea surface?
Well, for one thing, if dislodged, it might melt, resulting in the same type of methane gasses rising to the surface and causing any ships over a wide area to simply sink due to the decrease in buoyancy. We’re not talking a small area, either - think square kilometers. Lots of ‘em.