The Great Smog of London-An estimated 4,000 people died from the smog, but the actual number could be higher.

 London smog, also known as sulfurous smog, is a type of air pollution that's caused by high levels of sulfur oxides in the air. Here's some information about the chemistry of London smog: 

Causes

London smog is caused by burning sulfur-containing fossil fuels, especially coal. The sulfur in the fuel reacts with oxygen in the air to form sulfur oxides. 

Components

London smog is made up of soot, fly ash, sulfur dioxide, sodium chloride, and calcium sulfate particles. 

Health effects

London smog is a harmful pollutant that can irritate the eyes, nose, and lungs. It can also lead to breathing problems. 

Formation

London smog is aggravated by dampness and high concentrations of suspended particulate matter in the air. 

Acid rain

If concentrations of sulfur dioxide are high enough, it can react with atmospheric hydroxide to produce sulfuric acid, which falls as acid rain. 

Clean air laws

Clean air laws passed in 1956 have helped reduce smog formation in the United Kingdom. 

The Great Smog of London

The Great Smog of London was so dense that it seeped indoors, making it difficult to see and forcing the cancellation of events. An estimated 4,000 people died from the smog, but the actual number could be higher.