london's air pollution worse than beijing's as smog chokes uk capital - best air purifier for pollution

London was more polluted this week than Beijing.
Air pollution in the Chinese capital is well-known, but on Monday the air quality index showed that the concentration of particulate matter in London was 197 micrograms per cubic meter, compared with 190 micrograms in Beijing.
According to The Daily Telegraph, this is the first time that London has pushed up Beijing on this key indicator, although CO2 levels did soar in 2014.
The city, Westminster, Kensington and Camden are particularly polluted by smog in the British capital.
Levels of particulate matter in London have recovered to a maximum of 108 in Kingston. upon-
The River Thames, about 100 kilometers in the city center, has returned home prices to 300 in Beijing.
These numbers refer to PM2.
5, or particles of dust less than 2.
5 microns in diameter.
From power plants and industrial processes to the burning of motor vehicles and residential wood, they are all produced by various types of combustion.
Some parts of London were listed as "black" alerts this week, the highest level of pollution warnings.
Mayor Sadik Khan said on Twitter: "Today the shameful state of toxic air in London triggered a" very high "air pollution alert under my new air quality warning system.
"The current weather is still cold, which means the contaminants will not be dispersed.
Last week, toxic air clouds from German factories moved to London, coupled with vehicle pollution from London's crowded roads.
A text message warning from the City Hall to people in the affected areas was: "The air pollution forecast on Thursday is high.
Consider spending less time outdoors and taking medicine.
If you are unwell, contact the general practitioner.
The signs of the subway station, bus station and Riverside terminal all broadcast warning messages to the commuters, while the road-
The side display board warns drivers to reduce the engine in case of traffic jams to reduce emissions.
High levels of pollution have also occurred in South Wales and elsewhere in the UK.