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Local authorities were given the power to establish "smoke control areas" where only smokeless fuels could be used. This aimed to reduce the smoke and soot released into the air.

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The Great Smog of 1952 was created by a combination of natural weather conditions and human-caused pollution.

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London was known for its frequent "pea-soupers," a term used to describe thick, yellowish-green fog mixed with coal smoke. These smogs were common throughout the 19th century as the city industrialized and more coal was burned. While not as deadly as the 1952 smog, they caused significant respiratory problems and contributed to public health issues over time.

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In January 1880, another major smog event hit London, contributing to about 1,000 excess deaths. This smog had similar characteristics to later events, with a combination of fog and coal smoke leading to severe air pollution.

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One of the earlier significant smog events occurred in December 1873, resulting in an estimated 268 deaths. This event was one of many that demonstrated the public health risks posed by coal smoke in the atmosphere.

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In December 1892, London experienced another severe smog that caused approximately 1,000 deaths. This event was notable for its duration and intensity, leading to calls for action to address air pollution in the city.

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A cold spell in December led the people of London to burn more coal for heating: The burning of low-grade coal released large amounts of soot, sulfur dioxide, and other pollutants into the air.

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In addition to cold weather and coal smoke entering the air, a weather phenomenon called a temperature inversion occurred, where a layer of warm air trapped the cold air near the ground. This prevented the polluted air from rising and dispersing.

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The smog caused a sharp rise in respiratory illnesses, leading to a surge in hospital admissions. The healthcare system was overwhelmed with patients suffering from conditions like bronchitis, pneumonia, and other lung-related illnesses. This increased demand for medical care led to higher public healthcare costs.

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With estimates of around 12,000 deaths and tens of thousands suffering from long-term health effects, the economic cost of lost lives and reduced productivity due to illness was substantial. Many people were left unable to work, leading to a loss of income and increased pressure on social welfare systems.

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In response to the Clean Air Act of 1956, there was a need to retrofit homes with cleaner heating systems. This required significant investment from both the government and private households. The shift from coal to cleaner fuels like gas and electricity also increased energy costs for many families.

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The sulfur dioxide released from coal burning eventually contributed to acid rain. Acid rain can damage ecosystems by lowering the pH of soil and water, harming plant life, aquatic life, and microorganisms. Though not immediately evident during the smog event, this longer-term impact affected areas downwind of London.

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The disaster prompted the British government to take action, leading to the passage of the Clean Air Act in 1956, which aimed to reduce air pollution by introducing smokeless zones and encouraging the use of cleaner fuels. The event is remembered as a turning point in environmental policy and public awareness of air pollution's dangers.

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While minor pollution episodes still occur in modern times, especially during temperature inversions or when pollution levels are high, these are far less deadly due to the regulations that were put in place to prevent a repeat of such catastrophic events.

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The toxic smog had a harmful effect on vegetation, especially in urban parks and gardens. The high levels of sulfur dioxide and particulate matter interfered with photosynthesis and damaged plant tissues. Trees and plants that were exposed to the smog showed signs of distress, such as leaf damage and stunted growth.

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The pollutants from the smog eventually settled onto the ground and were washed into rivers and streams by rain. This led to contamination of water sources, which could affect aquatic ecosystems and the quality of drinking water.

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The Great Smog of London in 1952 marked a turning point in how humans perceive their relationship with the environment and their responsibility toward one another. This tragic event, which led to thousands of deaths, exposed the direct link between industrial pollution and public health. It forced society to recognize that unchecked environmental degradation could have devastating consequences, not just for nature, but for human life.