Fog event
In January 1880, a four-day fog event in London killed some 1,100 people. Image. Photograph of Widnes (north west England in the late nineteenth century, from D. W. F. Hardie, A History of the Chemical Industry in Widnes. 1950. Courtesy of Wikimedia Commons:https://upload.wikimedia.org/wikipedia/commons/8/8c/Widnes_Smoke.jpg.
