This photograph from 1940 shows a polluted stream in Dubuque, Iowa. Dubuque's main industry was manufacturing, and these large companies lacked proper waste disposal in the city in the 1940s.
- What items are in the stream? Why would people dump items like this in a stream?
- How will this pollution affect the stream? How will this pollution affect humans and animals?
Vachon, John, "Stream pollution, Dubuque, Iowa," April 1940. Courtesy of Library of Congress