When a certain amount of fossil fuels can be extracted from the ground at a profitable amount, this amount is called a D. Reserve.
What are reserves of fossil fuels?
The reserves of fossil fuels is the quantity of that fossil fuel that humans are able to extract for use using the current technology available to us.
Nations that have huge reserves such as Russia and Saudi Arabia, have become quite rich from fossil fuel trade.
Find out more on fossil fuel reserves at https://brainly.com/question/15424716.
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