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Fig. 4 | Environmental Health and Preventive Medicine

Fig. 4

From: Effect of COVID-19-restrictive measures on ambient particulate matter pollution in Yangon, Myanmar

Fig. 4

Comparison of the percent reductions among the five data sources. A PM2.5 concentration and B PM10 concentration. The five data sources are PurpleAir (2019), PurpleAir (2020), MGT, SOK, and TKT. Using the period, February 24 to March 2 (first period) as reference, the percent reductions for the other three study periods, i.e., May 10 to May 17, August 31 to September 6, and December 7 to December 14, were calculated

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