The Killer Fog | 1999
On December 5, 1952, the fog that blanketed London, England, at first didn't seem out of the ordinary. But over the course of the next two days, the fog turned brown and then black. By the time it lifted on December 12, at least 4,000 were dead or dying from it, although some claim the true death toll would end up at 12,000. The program examines how a combination of weather patterns and air pollution caused the killer fog and what affect it would have on future British environmental laws.