The deadly smog that hovered over London claimed more lives than one could ... The toxic, black-yellow fog reduced visibility to just several dozen feet, resulting in many accidents.

A London policeman wearing a mask for protection against the thick fog which hit most of the country and turned to smog in the city on Jan. 1, 1962. (Photo by Keystone/Getty Images) London's poor ...

Without warning, noxious fog would roll in for days and sometimes weeks ... which was different from the sulfurous smog that claimed lives in Donora, Pa., and London, England. In those places, the ...