Fossil fuels.
Coal, fuel, they take millions of years to be formed.
Coal, fuel, they take millions of years to be formed.
Oil and coal.
Coal, fuel, they take millions of years to be formed.
fossil fuels
fossil fuels
fossil fuels
Volcanoes formed the Hawaiian Islands over millions and millions of years.
Fossil fuels are the sources of energy formed millions of years ago under the ground (coal, oil and natural gas).
Fossil Fuels such as coal, oil, and natural gas.
it was formed millions of years ago
Electrical energy can be formed by solar, wind or hydro energy. This energy is transformed into electrical energy.