Fix grammatical errors in this sentence: They are the supply of traditional source of fuels, such as coal, petroleum and natural gas which are known as non-renewable fuels.
The fuel is the source of the fuel.
The fuel is the source of the fuel.
The fuel is the source of the fuel.
The fuel is the source of the fuel.
The fuel is the source of the fuel.
The fuel is the source of the fuel.
The fuel is the source of the fuel.
The fuel is the source of the fuel.
The fuel is the source of the fuel.
The fuel is the source of the fuel.
The fuel is the fuel that is used to produce energy.
The fuel is the fuel that is used to produce energy.
The fuel is the fuel that is used to produce energy.
The fuel is the fuel that is used to produce energy.
The fuel is the fuel that is used to produce energy.
The fuel is the fuel that is used to produce energy.
The fuel is the fuel that is used to produce energy.
The fuel is the fuel that is used to