Where is pea soup fog found and what it?

"Pea soup fog" is a term used to describe a dense, yellowish fog that is often associated with London, England.

Characteristics of Pea Soup Fog:

* Dense: It is so thick that visibility is greatly reduced, sometimes to only a few feet.

* Yellowish color: The fog gets its characteristic color from the presence of smoke and other pollutants.

* Moist: It is typically formed when moist air condenses around small particles in the atmosphere.

Causes of Pea Soup Fog:

Pea soup fog is a type of smog, which is a combination of smoke and fog. In London's case, the fog was heavily influenced by industrial pollution from coal-burning industries in the 19th and early 20th centuries.

Formation:

1. Industrial pollution: Coal burning released soot and sulfur dioxide into the air.

2. Moisture: Moist air from the North Sea or the English Channel moved into the city.

3. Cold temperatures: Cold air temperatures caused the moisture to condense around the pollutants, forming a dense, yellowish fog.

Impact:

Pea soup fog had a significant impact on public health in London, contributing to respiratory illnesses and increasing mortality rates. It also disrupted transportation and daily life.

Decline:

The prevalence of pea soup fog in London declined dramatically after the Clean Air Act of 1956, which restricted coal burning in the city. Today, the term "pea soup fog" is primarily used to describe a historical phenomenon, although similar conditions can still occur in areas with heavy air pollution.