Fig. 1 a shows that median NO 2 concentrations have decreased at all sites in northern, central, and southern Florida during the lockdown in 2020 compared to the historic period (also see Table S7).On average, the observed decrease in NO 2 concentrations across Florida was 25.2 ± 9.2% (±1σ, where σ is the standard deviation of the percent change between cities; Fig. 1 g).
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