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

CNA Explains: Why PSI and AQI readings differ - and which one should you follow during haze season?
Photo: CNA — Singapore · view original

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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