]> 2026-08-04T19:59:31+00:00 Fossil fuels 14 en 2008-06-08T07:23:17Z 2454625.8078357 Fossil fuels Unburned hydrocarbon 0 en Unburned hydrocarbon Cutan 0 en Cutan Hydrous pyrolysis 0 en Hydrous pyrolysis Coal 14 en Coal Oil shale 14 en Oil shale Natural gas 14 en Natural gas Tar sands 14 en Tar sands Cutan 0 en Cutan Hydrous pyrolysis 0 en Hydrous pyrolysis Unburned hydrocarbon 0 en Unburned hydrocarbon INST 102 en INST Subcategory of 102 en Subcategory of