Fossil fuels increase the amount of free carbon in the global carbon cycle.
Fossil fuels are those fuels which are obtained from the conversion of fossils of dead plants and animal which over a long period of time and under intense heat and pressure are converted to fuels.
Examples of fossil fuels are coal, natural gas and petroleum.
Fossil fuels mostly contain carbon which is released into the atmosphere in the form of carbon dioxide when these fuels are burned.
Therefore, fossil fuels increase the amount of free carbon in the global carbon cycle.
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