One of the reasons why London is called the foggy city is because of the weather.

London is called "Fog City" because the air is wet, rainy and foggy, so the urban area of London is often full of wet fog, so there is another name called "Fog 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 calls London "smog", hence the name "Fog Capital".

London is the capital of the United Kingdom of Great Britain and Northern Ireland and one of the largest financial centers in the world. It is also known as "Port Newland" with new york and Hongkong.

London is located on the plain in the southeast of England, where the Thames River passes. The coordinates of the city center are 5130' north latitude and 0.15' east longitude. Greater London Metropolitan Area has a population of about 8.28 million (20 16) and an area of 1577 square kilometers. In 20 16, the GDP of London has reached 553.5 billion dollars.

References:

Baidu Encyclopedia-London