Non-renewable resources are natural resources that cannot be replenished or replaced on a human timescale. Examples of non-renewable resources include fossil fuels (such as oil, gas, and coal), minerals (such as gold, copper, and iron), and groundwater.

Renewable resources are natural resources that can be replenished or replaced on a human timescale. Examples of renewable resources include solar energy, wind energy, hydropower, and biomass.

The source of a natural resource refers to the place or location from which it is obtained. For example, the source of fossil fuels is the earth's crust, the source of solar energy is the sun, and the source of wind energy is the wind.