BANGKOK, Oct. 18 (Xinhua) -- Thailand's Pollution Control Department (PCD) on Wednesday reported Unhealthy Levels of air pollution in several parts of Bangkok and its surrounding areas as the season change brought the return of excessive dust particles.
Moderate to unhealthy levels of PM 2.5, ranging from 27-55 micrograms per cubic meter, were detected in most areas in the Bangkok Metropolitan Region on Wednesda
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