They are fossil fuels, currently supplying around 93% of the world's energy. However, renewable sources of energy, such as wind or tidal power only provide 7%. Fossil fuels are fast running out and renewable sources are definitely the way forward.
The major fossil fuels are coal, oil, and natural gas.
chemical energy
Coal AND Oil
Coal and oil are both fossil fuels.
The three main fossil fuels are coal, oil and natural gas
Fossil fuels (coal, oil and natural gas), and coal contributes the most.Fossil fuels (coal, oil and natural gas), and coal contributes the most.
Oil, Coal, and Petroleum
GasCoalOilWood (I guess 4 fuels)
gas, oil and coal
Coal oil, and natural gases are examples of fossil fuels
Gas, Oil and Coal
Alternatives fuels are fuels that are not made from fossil fuels (coal, oil and natural gas).