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Archive for September, 2020

Good (air quality) news you probably didn’t hear about

A new study in The Lancet has shown that between 2013 and 2017, air pollution in 74 key Chinese cities fell by a third, driven by a 85.4% decline in household air pollution and a 12% decline in PM2.5. As a result, the death rate attributable to air pollution has plummeted by more than 60%, saving hundreds of thousands of lives.

(Although – gulp – the average annual population-weighted PM2·5 exposure in China was 52·7 μg/m3 (95% uncertainty interval [UI] 41·0–62·8) in 2017, which is 9% lower than in 1990 (57·8 μg/m3, 45·0–67·0)).

[Source: Future Crunch, 17 Sep 2020]

the new AQI

[Source: (US) National Weather Service Spokane]