Classification of fuel type

1. - Total primary and secondary energy

1.1 - Primary energy

'Primary energy fuel types are energy commodities that are either extracted or captured directly from natural resources.'

1.1.1 - Total coal

1.1.2 - Crude oil

1.1.3 - Natural gas

1.1.4 - Gas plant natural gas liquids (NGL's)

1.1.5 - Primary electricity, hydro and nuclear

1.1.6 - Renewable fuels

Fuel ethanol, biodiesel, and renewable diesel fuel.'

1.1.7 - Steam

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