History: 1949, Hillside houses overlook smoke-belching steel mills, Pittsburgh Photograph by John E. Fletcher, J. Baylor Roberts, and B. Anthony Stewart, National Geographic [900 X 705]

https://i.redd.it/hys20mmvfds61.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/mo7uj2/1949_hillside_houses_overlook_smokebelching_steel/?utm_source=ifttt