Great Smog of London

Nelson's Column during the Great Smog of 1952

The Great Smog of London was a severe air-pollution event that affected the British capital of London during early December 1952. It is considered one of the most significant environmental disasters in British history and led to major changes in environmental policies and regulations.

Background

During the early 20th century, London was known for its frequent fogs, which were often exacerbated by industrial pollution. The city's reliance on coal as a primary source of fuel contributed significantly to the problem. The term "smog" itself is a portmanteau of "smoke" and "fog," reflecting the combination of these elements.

The Event

The Great Smog began on December 5, 1952, and lasted until December 9, 1952. A period of cold weather, combined with an anticyclone and windless conditions, collected airborne pollutants—mostly from the use of coal—in the atmosphere, forming a thick layer of smog over the city. The smog was so dense that it reduced visibility to a few meters, disrupted transportation, and even seeped indoors, affecting visibility and air quality inside buildings.

Health Impact

The smog had a devastating impact on public health. It is estimated that around 4,000 people died prematurely during the event, with some estimates suggesting that the total number of fatalities could be as high as 12,000. The primary causes of death were respiratory tract infections, hypoxia, and other complications related to the inhalation of polluted air. Thousands more suffered from illnesses such as bronchitis and pneumonia.

Government Response

The Great Smog of London prompted the British government to take action. In 1956, the Clean Air Act was passed, which aimed to reduce air pollution by introducing smokeless zones where only smokeless fuels could be burned. This legislation marked a significant step towards improving air quality in urban areas and set a precedent for future environmental policies.

Legacy

The Great Smog of London remains a pivotal event in the history of environmental science and public health. It highlighted the severe consequences of industrial pollution and the need for regulatory measures to protect air quality. The event is often cited in discussions about air pollution and its impact on health and the environment.

See Also

• Air pollution
• Clean Air Act 1956
• Environmental policy
• Public health
• Smog