Retrocop: //This is where most of the blame lies. Not the streets of London.//
That image was from 2015. China's government has made huge strides since then to clean up the atmosphere.
China leads the world in the use of electric vehicles; in the use of solar power and is moving faster than any other country in the control of emissions.
Current air quality in Beijing is good:
http://aqicn.org/city/beijing/
In fact better than in London. Pollution levels in London right now are twice as high as those in Beijing
http://aqicn.org/city/london/
SO the problem really does lie in the streets of London, rather than the streets of Beijing.
I visit there three or four times a year (last time in September; next in November). Pollution control and emissions control is right at the top of the agenda for all industry - especially in the most heavily-polluted areas, such as the Beijing-Tianjin region.
You can see the levels f