Question: Return the mean values of PM2.5 (particulate matter <2.5 micron diameter) & VPM2.5 (volatile particulate matter <2.5 micron diameter) by each station for the year

Return the mean values of PM2.5 (particulate matter <2.5 micron diameter) & VPM2.5 (volatile particulate matter <2.5 micron diameter) by each station for the year 2019 for readings taken on or near 08:00 hours (peak traffic intensity).

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