A natural resource is anything that people can use which comes from nature. People do not make natural resources, but gather them from the earth. Examples of natural resources are air, water, wood, oil, wind energy, hydro-electric energy, iron, and coal.We often say there are two sorts of natural resources: renewable resources and non-renewable resources.A renewable resource grows again and comes back again after we use it. this is like a rebounding ball . For example, soil, sunlight, water and wood are renewable resources. A non-renewable resource is a resource that does not grow and come back, or a resource that would take a very long time to come back. And this one is like a sin once done is done. For example, When we use coal, there is less coal afterward. One day, there will be no more of it to make goods. The non-renewable resource can be used directly (for example, burning oil to cook), or we can find a renewable resource to use (for example, using wind energy to make electricity to cook). It is important to conserve (save) non-renewable resources, because if we use them too quickly there will not be enough.Most natural resources are limited. This means they will eventually run out. A perpetual resource has a never-ending supply. Some examples of perpetual resources include solar energy, tidal energy, and wind energy.  Other examples are salt, stone, magnesium, and diamonds.Some of the things influencing supply of resources include whether it is able to be recycled, and the availability of suitable substitutes for the material. Non-renewable resources cannot be recycled. For example, oil, minerals, and other non-renewable resources cannot be recycled.