Nonrenewable Resource
What is Nonrenewable Resource?
A nonrenewable resource has a fixed stock that does not regenerate on a human timescale, so every unit used today is one fewer unit available later.
Oil, coal, natural gas and mineral ores form over geological time, so for practical purposes the stock is fixed. That makes extraction different from ordinary production: pumping a barrel today gives up the chance to sell it later, and the forgone future profit is a real cost, called scarcity rent or user cost. A competitive price therefore covers both the marginal cost of getting the resource out of the ground and this scarcity rent, and the rent tends to grow over time at roughly the interest rate, since owners will only leave the stock in place if waiting pays as well as selling and investing the proceeds. A renewable resource is different, because it regrows: a fishery or forest can be harvested forever if the harvest stays at or below the regrowth rate.
Nonrenewable Resource: a worked example
A well owner can sell a barrel today for $80 when lifting it costs $30, leaving a scarcity rent of $50. Suppose the interest rate is 10 percent. Selling now and investing the $50 yields $55 in a year, so the owner leaves the barrel in the ground only if next year's rent is at least $55, which means a price of at least $30 + $55 = $85. If owners expect a price below $85, they pump faster now, and the extra supply pushes the price down until holding and selling are equally attractive again.
The mistake students make with nonrenewable resource
The usual mistake is reading nonrenewable as a countdown to a date when the resource physically runs out. Economically, scarcity shows up in price first: as cheap deposits are used up, price rises, and a higher price brings on substitutes, recycling and deposits that were not worth mining before. Reserves are an economic figure, not only a geological one. The mirror error is assuming renewable means inexhaustible, when a fishery harvested faster than it breeds still collapses.
Nonrenewable Resource questions
What is the difference between a renewable and a nonrenewable resource?
A renewable resource regenerates on a human timescale while a nonrenewable one does not. Forests, fisheries and groundwater can be used indefinitely if the rate of use stays at or below the rate of regrowth or recharge. Oil, coal and metal ores have a fixed stock, so use today permanently reduces what is left.
Why does the price of a nonrenewable resource include scarcity rent?
Scarcity rent is included because selling a unit now means giving up the chance to sell it later, and that lost future profit is an opportunity cost. A competitive owner will not sell below extraction cost plus that rent. This is why resource prices sit above the cost of bringing the next unit out of the ground.
Are nonrenewable resources a market failure by themselves?
No, a clear and enforced ownership right gives an owner a reason to conserve the stock, because leaving it in the ground preserves its value. Market failure appears when access is open to everyone, as with an unowned oil pool or fishery, since each user races to extract before the others do. Pollution released when the resource is burned is a separate externality problem.
Formula / Example
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Common comparisons
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