Changes in air quality during the lockdown in Barcelona (Spain) one month into the SARS-CoV-2 epidemic.

Sci Total Environ · 2020 · PMC7151283 · PMID 32302810

Europe PMC DOI

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a definite trendno p-value reported

The low SO 2 concentrations recorded (around 1.0 to 2.6 μg/m 3 as averages of the different sites) in the study period and the slight changes (−0.2 and +0.1 μg/m 3 , for UB and TR sites, close to the detection limit) does not allow evidencing a definite trend.

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