What is stock of resource?
Answers
Some resources, such as minerals or oil, exist as finite stocks, which are non-renewable within an economic time frame. Others, such as timber or solar energy are renewable and, potentially, the flow of services from these resources can be harvested indefinitely.
Explanation:
Stock resources are commodities that can be spent on a permanent basis and are therefore non-renewable and typically expressed in total amounts rather than prices. Types of stock resources include fossil fuels (coal, oil, gas), silver, copper, tin, uranium, etc.
In normal circumstances, flow resources are not indefinitely expendable, i.e. they are renewable; they are substituted resources. They are commonly expressed in their annual rates of regeneration. Examples include the precipitation of fresh water and timber.