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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Int+J+Environ+Health+Res 2022 ; 32 (8): 1801-1814 Nephropedia Template TP
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Unexpected reduction in ozone levels in a mid-size city during COVID-19 lockdown #MMPMID33890519
Tavella RA; Fernandes CLF; Penteado JO; De Lima Brum R; Florencio Ramires P; Coutelle Honscha L; Dos Santos M; Volcao LM; Muccillo-Baisch AL; Da Silva Junior FMR
Int J Environ Health Res 2022[Aug]; 32 (8): 1801-1814 PMID33890519show ga
The current study evaluated ozone levels through passive samplers installed in 4 different points in a medium-sized city (Rio Grande, Brazil) with naturally low NO(2) levels during a week of COVID-19 lockdown. Additionally, we evaluated the consequences of this response with regard to human health risk assessment and reduction of hospital admissions and ozone-related deaths. The reduction in ozone levels, one month after the implementation of containment measures, varied between 26 and 64% (average of 44%), in the different studied sites. The reduction of human mobility during the pandemic reduced the levels of ozone in Rio Grande city and consequently will bring benefits to health services in the municipality. This unexpected reduction in O(3) levels must be related to the low 'natural' levels of NO(2) in the city, which make the contribution of other precursors important for the fluctuation of O(3) levels.