#instestine

All Your GUTS

carbon dioxide is very good for plant-life and thereby all life on earth.

yes harvesting methane hydrates from the seabed would require a large amount of tools.

however there are more "sustainable" sources of methane, such as from our sewage-systems.

we could attach a release valve from the large-intestine to gas-storage,  then can use for heating and cooking.

additionally we could probably heat some water near the intestinal/composting tracts, could pump/valve it around the boat for temperature modulation, and potentially use as hot-water.

 what I mean by valve it around, is that boats tend to sway on the waves, with some one-way valves, can take advantage of this effect to passively move the water around the pipes in a single direction, we could achieve similar effect with sewage tracts.