Resources which are finite i.e. not replaced.
Resources of which there is a fixed supply, such as metal ores and fossil fuels, and which will eventually be exhausted
Natural resources that are not naturally replenished once they have been harvested. Non-renewable resources can be used up completely or else used up to such a degree that it is economically impractical to obtain any more of them. Fossil fuels and metal ores are examples of non-renewable resources.
Resources which cannot be replaced once they have been used up e.g. coal, gas, oil