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
Fossil fuels.
Coal AND Oil
The three main fossil fuels are coal, oil and natural gas
Oil, Coal, and Petroleum
Natural GasCoalOilMethane Clathrates (methane/water ices)
Coal oil, and natural gases are examples of fossil fuels
gas, oil and coal
Fuels that can be used only once are classified as non-renewable. They are also usually fossil fuels (coal, oil and natural gas).
Alternatives fuels are fuels that are not made from fossil fuels (coal, oil and natural gas).
Fossil fuels (coal, oil and natural gas).