Examlex
Which of the following substances has increased markedly due to the use of fossil fuels and contributes to the greenhouse effect?
User Cost
The cost of using a product or service, taking into account factors such as depreciation, wear and tear, and opportunity cost of using the asset rather than investing the money elsewhere.
Depletable Resource
A natural resource that can be diminished by use, such as fossil fuels or minerals, which are not renewable over short time spans.
User Cost
The cost of using a good or service, including the actual price paid and other sacrifices (like time or effort).
Oil Reserves
Quantities of crude oil that are confirmed to be recoverable under current economic and operating conditions.
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