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並前往https://www.reigate-banstead.gov.uk/info/20333/air_quality/570/pollutants_-_air_quality

air quality | Pollutants - Reigate and Banstead

Nitrogen Dioxide, 105 ppb (200 µg/m3) (hourly mean not to be exceeded more than 18 times per year) 21 ppb (40 µg/m3) (annual mean), 31 Dec 2005.

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