Fossil fuels
Most commonly used fossil fuel
Crude oil
Energy from the sun
Solar power
The country that consumes the most energy
China
Solid carbon burnt to generate energy
Coal
Nuclei split into smaller nuclei, generating energy
Nuclear fission
The country that produces the most 'clean' energy per person on Earth
Iceland
Fuel used in aeroplanes
Kerosene
Combining of nuclei to form heat
Nuclear fusion
The most widely-used renewable form of energy
Hydroelectricity