ការព្យាករណ៍គុណភាពខ្យល់
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ទិន្នន័យគុណភាពខ្យល់ផ្តល់ដោយ៖ the Air Quality in Wales (airquality.gov.wales)
Note that the measurements for PM2.5 (fine particulate matter), PM10 (respirable particulate matter) and SO2 (sulfur dioxide) are taken from the station: Cardiff Centre