Energa̕ Energy 46 Petrl̤eo Fuentes de energa̕ 45 Energy sources 44 Gas natural 39 Natural gas 39 meer ... Combustibles 31 Fuels 31 Oil 27 Environment 19 Medio ambiente 19 Petroleum 19 Combustibles fs̤iles 13 Fossil fuels 13 Industria del petrl̤eo 11 Monetizacin̤ de gas natural 11 Petroleum industry 11 Natural gas monetization 10 Industria petroqum̕ica 8 Petrochemical industry 8 Petroleum refining 8 Refinacin̤ del petrl̤eo 8 Petroleum technology 7 Tecnologa̕ del petrl̤eo 7 Gas hydrates 6 Hidratos de gas 6 Coque de petrl̤eo 5 GNL 5 Gas natural licuado 5 minder ...