What is the origin of London's foggy city?

At the beginning of the 20th century, most people in London used coal as household fuel, which produced a lot of smog. These smog, together with the climate in London, caused the "well-known" smog in London, which is called London fog in English.

Therefore, English sometimes refers to London as "foggy city", hence the name "foggy city". 195212 from February 5 to 9, the fog and haze incident in London caused 4000 deaths. Therefore, the government implemented the Clean Air Act in 1956, prohibiting the use of smog-producing fuels in some parts of London.

London, on the other hand, is influenced by the North Atlantic warm current and the west wind, and belongs to a temperate maritime climate. The temperature difference between the four seasons is very small, and it is cool in summer, warm in winter, humid in air, rainy and foggy, especially in autumn and winter.

Hydrology in London:

Thames is an important river in London. It originated in the Cotswolds near Ceste in Salem, southern England. It flows from west to east, turns southeast at Oxford, turns northeast at Reading, turns east again at Windsor, flows through London, and finally flows into the North Sea near Southend.

The Thames River has a complex water network and numerous tributaries, the main tributaries of which are Shane River, Cohen River, Cole River, Vindra River, Avonlod River, Chawell River, Ray River, Oak River, kennet River, Loden River, Weil River, Leigh River, Leigh River, Roding River and Durrant River.

Reference to the above content: Baidu Encyclopedia-London