|Description:||This 1950s historical photograph was provided by the Center for Disease Control's (CDC), National Institute for Occupational Safety and Health (NIOSH). The image showed an extreme air pollution event due to Salt Lake City, Utah smog, which occurred on November 11, 1950, and was made as part of a U.S. Public Health Service (USPHS) study. Air pollution can be a major cause of a variety of respiratory illnesses.|
The NIOSH Historic Photo Collection began as the “picture file” of the Industrial Hygiene Division of the U.S. Public Health Service (USPHS), c. 1930-1960. It is a unique collection of mid-20th Century images of American workers and workplaces and documents occupational safety and health research of that era. The collection consists of approximately 1,000 original photographs and schematic drawings.