This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
DUST FROM OPERATIONS OF GRAIN ELEVATORS CONTRIBUTE TO AIR POLLUTION OF DULUTH MINNESOTA. AND SUPERIOR WISCONSIN NARA .tif Scope and content General notes Local identifier DA Environmental Protection Agency NARAAuthor Emmerich Donald Photographer File DUSTFROMOPERATIONSOFGRAINELEVATORSCONTRIBUTETOAIRPOLLUTIONOFDULUTH MINNESOTA