LONDON'S FOGGIEST ERA
In the first half of the 20th century, London was covered in almost constant “fog” until 1956, when the Clean Air Act was implemented, but the fatalities from the Great Smog in 1952, when the smog was at its highest, are said to have reached 12,000.
Take a glimpse into life in the foggiest of cities - old London.
Clancy's comment: Mm ... not only then. Venice and London were the same in the early 70's. It was spooky and mysterious, but not good for tourists.