The document discusses the potential for using methane hydrate structures as an energy source by extracting methane gas from hydrate deposits in ocean floors and arctic tundra. Methane hydrate forms naturally when methane gas combines with water under high pressure and low temperatures. These methane hydrate deposits represent an enormous untapped energy source that could be harvested using engineered systems. The document outlines some design challenges for autonomous systems and vehicles that could sustainably extract methane from hydrate deposits to generate power on kilowatt scales for distributed sensor networks and unmanned vehicles. Oxygen could potentially be used to facilitate extracting the methane gas from the solid hydrate structures.