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:
ON LAKE SUPERIOR SMOKE FROM THE CHIMNEYS OF SUPERIOR FIBER PRODUCTS INC. LEFT. DUST FROM THE CONTINENTAL GRAIN... NARA . Scope and content General notes Local identifier DA Environmental Protection Agency NARAAuthor Emmerich Donald Photographer File ONLAKESUPERIOR SMOKEFROMTHECHIMNEYSOFSUPERIORFIBERPRODUCTS INC LEFT DUSTFROMTHECONTINENTALGRAIN