An example of a non-renewable resource is solid mineral. Non-renewable resources are natural resources that cannot be easily replenished or regenerated, and once they are used up, they are gone forever. Solid minerals such as coal, oil, and natural gas are finite resources that were formed over millions of years through geological processes, and their reserves are being depleted much faster than they are being replaced. Other examples of non-renewable resources include minerals, metals, and some types of groundwater. It is important to use these resources wisely and efficiently, and to develop alternative sources of energy and materials that are renewable and sustainable.