Energa̕ 89 Energy Fuentes de energa̕ Energy sources 88 Gas natural 52 Natural gas 52 Petrl̤eo 45 mehr ... Combustibles 39 Fuels 39 Environment 27 Medio ambiente 27 Oil 26 Petroleum 19 Combustibles fs̤iles 16 Fossil fuels 16 Petroleum refining 16 Refinacin̤ del petrl̤eo 16 Monetizacin̤ de gas natural 14 Industria del petrl̤eo 13 Petroleum industry 13 Power technology 13 Tecnologa̕ energťica 13 Petroleum technology 12 Tecnologa̕ del petrl̤eo 12 Hidrotratamiento 10 Hydrocracking 10 Hydrotreatment 10 Industria petroqum̕ica 10 Natural gas monetization 10 Petrochemical industry 10 weniger ...