This document discusses natural resources and different types of energy resources. It defines renewable and nonrenewable resources. Renewable resources can replenish themselves and include vegetation, sunlight, air, soil, geothermal, water, and ice. Nonrenewable resources exist in fixed amounts and include coal, oil, natural gas, petroleum, minerals, and uranium. Fossil fuels are discussed as a major nonrenewable energy resource that can cause pollution but are relatively cheap. Renewable energy resources with less environmental impact include water, wind, sun, and geothermal. The document also notes that extracting any resource has an environmental cost that must be weighed against economic benefits.