Whoa, how does that make sense though? The idea is to keep the methane hydrates nice and frozen at the bottom of the ocean. Not to release them into the atmosphere. Sure, 10 tons of pure methane is worse than 10 tons of CO2. But we don't want 10 tons of either extra gas in the atmosphere. Its kind of like being stranded on an island with 3 sandwiches. If you ration, you'll have food for longer. But to take your argument, you should eat them all right away because you'll be hungry eventually anyway.