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CNA Explains: Why PSI and AQI readings differ - and which one should you follow during haze season?

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Headline as filed by Channel News Asia.

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Channel News Asia CNA Explains: Why PSI and AQI readings differ - and which one should you follow during haze season?
While the National Environment Agency uses the 24-hour PSI and 1-hour PM2.5 to track air quality, other online platforms monitor pollution levels differently.
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CNA Explains 17 National Environment Agency 3

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