Non Renewable Energy. Primary energy sources include fossil fuels petroleum natural gas and coal nuclear energy and renewable sources of energy. The original organic matter with the aid of heat and pressure becomes a fuel such as oil or gas.
This means that they do not emit any carbon dioxide when they generate energy. Electricity is a secondary energy source that is generated produced from primary energy sources. Coal petroleum and natural gas.
Nuclear though not renewable is also considered a carbon free energy source because unlike coal and natural gas it does not burn.
An example is carbon based fossil fuel. This means that they do not emit any carbon dioxide when they generate energy. Oil also known as petroleum can be extracted and refined in order to make products such as gasoline diesel. Solar wind and hydroelectric are carbon free.
