SINGAPORE: Singapore’s air quality improved on Sunday as winds shifted to blow from the south, but lingering haze kept the 24-hour Pollutant Standards Index (PSI) in the unhealthy range of 106 to 186.
SINGAPORE: Singapore’s air quality improved on Sunday as winds shifted to blow from the south, but lingering haze kept the 24-hour Pollutant Standards Index (PSI) in the unhealthy range of 106 to 186.
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