Besides defining aggregates, the poster's images and information also clearly depict the production and uses of aggregates. Illustration and text build public awareness of the indispensable strength and aesthetic contributions aggregates add to everyday living. From airports to zoos, American communities are built on nature's building blocks—aggregates. The black and white reverse of the poster supplies background information and suggestions for student learning activities. K-8, 23" x 35", Full Color, B/W back.