This document discusses different types of natural resources including renewable and nonrenewable resources. It defines natural resources as materials from the environment that are used by humans, including things like air, water, soil, plants and animals. Renewable resources can replenish themselves, like many biological resources, while nonrenewable resources form slowly and are finite, like fossil fuels. The document also categorizes natural resources as material resources, which are used to make objects, and energy resources, which can be converted into useful energy forms.