This
graph displays the breakdown of municipal
solid waste produced in the United States per year. Each color represents a different material, and each material is more prevalent as you read from bottom to top. Notice how each material, despite its placement on the graph, has increased from 1960 to 1995.
The first pie
chart breaks down the percentages by
weight of each type of waste that makes up the total amount of
solid waste in the United States. The second pie
chart breaks down the percentages by
weight of municipal
solid waste (a component of the first pie chart).