Smog in London has long been a problem. Smog is caused by air pollution in combination with a climate that creates the right conditions. The smog in London today is mild against what it was in 1952 – when 12,000 people died within a few days.

London’s smog is usually greenish and comparable to a pea soup.

On December 5, 1952, was a cold day. The city’s residents fired diligently extra coal to stay warm. The weather conditions this day were optimal – To create a huge poison cloud!

During the day, the visibility decreased to less than a meter. Ambulances and other socially important functions ceased to work. The entire London was paralyzed.

12.000 people died of smog in London

The huge cloud of pollution remained above London for five days. When the smog cloud finally dissolved, up to 12,000 people had lost their lives. It’s more than died during the worst nights of the Blitz, the German bombing of London during World War II.

The result of this disaster became the “Clean Air Act”, but it was introduced first in 1956. From now on, coal dust was severely restricted and, apart from some less dramatic days of heavy smog, living conditions in the megacity became easier.