This document discusses natural resources and how to conserve them. It defines renewable and nonrenewable resources. Renewable resources like solar and wind can be replenished, while nonrenewables like coal are finite. It also outlines some key threats like pollution, overhunting, deforestation, and mining. The document recommends conserving resources by reducing water and energy use, reusing materials, and recycling to help preserve Earth's natural assets for future generations.