London Just Set a New Modern Pollution Record

At times this week the British capital’s air quality has been worse than Beijing.

Primrose Hill, London in January.

Photographer: Dan Kitwood/Getty Images
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London isn’t called the “Big Smoke” for nothing.

The city’s poor air quality set a modern record during this week’s spate of pollution that occurred when cold, windless weather trapped emissions over the capital. More than 20 sites recorded levels that hit the limit 10 on an index maintained by King’s College London from Jan. 17 to Jan. 24, the most since the index was introduced in 2012, said Andrew Grieve, an analyst at the college.