PETALING JAYA: The haze worsened yesterday, especially in parts of Sarawak and the Klang Valley, with the number of areas recording unhealthy air quality readings rising from five at 9am to 16 by 6pm.
Sarawak was the worst hit state with the three highest Air Pollutant Index (API) readings –Samarahan (182), Sri Aman (177) and Kuching (163).
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