From glass to cloth, there are many familiar materials used in our daily lives. But which are natural and which are man-made? This colorful volume introduces the many materials used by people to build and create, including plastic, rock, and wood. It explains how each is made, used, and disposed of, with a focus on those that can be harmful to the environment and those that can be recycled or reused to help save Earth. A simple message of conservation and care for Earth supports elementary school curricula, encourages good citizenship, and aids in readers' understanding of cause and effect.