15 provinces red-zoned, less than half within safe limitations PUBLISHED : 12 Dec 2023 at 09: 15 Downtown Bangkok under a shroud of smog on Tuesday earlymorning. Hazardous smog levels continue to thicken, particularly in the Central Plain, with the worst level of PM2.5 dust reaching 134.8 microgrammes per cubic metre of air on Tuesday earlymorning, up from 96.6µg/m³ on Monday, according to the Geo-Informatics and Space Technology Development Agency (Gistda). At 7am on Tuesday, 15 provinces in the Central Plain were blanketed with red-code levels of particle matter 2.5 micrometres and less in size (PM2.5), consistingof Greater Bangkok. The worst l
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