In 1952 a fog in London left 4,000 dead in just 4 days but many more would die before the causes could be rectified. Worse than that, it had happened before and it’s happening again right now, somewhere else.With John Chidgey.Links of potential interest: Inversion (meteorology) Great Smog of London Battersea Power Station Clean Air Act 1956 Trams in London 1948 Donora Smog Pollution in China Support Causality on PatreonEpisode Gold Producer: 'r'.Episode Silver Producers: Chris Stone and Eivind Hjertnes.