energa̕ 35 energy 35 energy sources fuentes de energa̕ 35 Combustibles 33 Fuels 33 Combustibles fs̤iles 32 আরও ... Fossil fuels 32 oil 32 petrl̤eo 32 petroleum 31 gas natural 28 natural gas 28 Industria del petrl̤eo 11 Petroleum industry 11 industria del petrl̤eo 10 oil industry 10 industria petroqum̕ica 9 petrochemical industry 9 monetizacin̤ de gas natural 7 natural gas monetization 7 oil refining 7 refinacin̤ de petrl̤eo 7 Industria petroqum̕ica 6 Petrochemical industry 6 gas hydrates 6 hidratos de gas 6 environment 5 medio ambiente 5 Energy sources 4 কম ...