methane hydrate methane hydrate methane hydrate methane hydrate gas hydrates according to the US Office of Fossil Energy US DOE states D.O.E. Office of Fossil Energy METHANE HYDRATE DOE Methane Hydrate R&D Program methane hydrate according to the US Office of Fossil Energy Methane Hydrates Methane hydrate possibly exceeding all other fossil fuels combined Methane Hydrate Enligt USA:s energidepartement DOE Methane Hydrate R&D Program Methane Hydrate Methane clathrate methane hydrate methane hydrates D.O.E. Office of Fossil Energy Methane Hydrate: U.S. Department of Energy according to the US Office of Fossil Energy DOE Methane Hydrate R&D Program D.O.E. Office of Fossil Energy METHANE HYDRATE 164 倍 D.O.E. Office of Fossil Energy according to the US Office of Fossil Energ energy.gov methane hydrate according to methane hydrate Methane hydrates can release 164 cubic metres of natural gas methane hydrates according to the US Office of Fossil Energy according to the US Office of Fossil Energy methane hydrate METHANE HYDRATE DOE Methane Hydrate R&D Program methane hydrate according to the US Office of Fossil Energy