This document discusses renewable and non-renewable natural resources. It defines non-renewable resources as those found in the ground that are in finite supply, such as coal and oil, which cannot be replaced once depleted. Renewable resources can be regrown or replenished, such as trees, plants, animals, air, sunlight, and water, and will not run out if cared for properly. It provides examples of how these different resources are used by humans and the importance of both renewable and non-renewable resources.