The Straits Times
Ozone, not haze, caused unhealthy air quality in northern Singapore
The haze as seen from Toa Payoh, in the direction of MacRitchie Reservoir, at 9.05am on March 1, 2021.ST PHOTO: KUA CHEE SIONG
PublishedMar 1, 2021, 2:01 pm SGT
https://str.sg/JVmZ
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