Natural resources that can be regenerated through rapid natural cycles are called renewable natural resources. Renewable natural resources may be inexhaustible, that is, resources that are not likely to be exhausted by human consumption such as wind, sunlight and water. Soil, groundwater, forests and living organisms are exhaustible resources, which are replenished naturally after their consumption.
However, if the renewable resources are used at a rate faster than the rate at which they are renewed, they may get exhausted. In a natural cycle, a resource is never lost; it is simply passed on from one form to another. For example, water evaporates from the water bodies to the atmosphere, forms clouds and falls down as rain. This water either collects as groundwater or is returned to rivers and oceans.
Non-renewable resources include coal, petroleum, natural gas, mineral ores, diamonds, etc. These resources were formed in millions of years and hence will get exhausted, eventually. Judicious use of these resources would help in making them last longer.