Scientists think a hidden source of clean energy could power Earth for 170,000 years — and they've figured out the 'recipe' to find it Live ScienceHidden hydrogen: Earth's crust holds clues to untapped clean energy source Phys.orgGeologic hydrogen needs intensive R&D, says study gasworldNatural hydrogen resource accumulation in the continental crust NatureEstimates of trapped hydrogen globally – a reality check GeoExpro
