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Lockdown measures and air quality: evidence from Italian provinces.

Maurizio Malpede¹, Marco Percoco²

¹GREEN, Università Bocconi, Milano, Italy.

Letters in Spatial and Resource Sciences

|March 24, 2021

Summary

Implementing stricter lockdown measures in Italy significantly reduced air pollution, specifically particulate matter (PM10) and nitrogen dioxide (NO2). This improvement in air quality suggests a positive impact on public health.

Keywords:

Air quality COVID-19 Pandemics Particulate matter Pollution

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Area of Science:

Environmental Science
Public Health
Epidemiology

Background:

Air pollution poses significant risks to public health.
Lockdown measures were implemented in Italy to curb the spread of COVID-19.
Understanding the environmental impact of these measures is crucial.

Purpose of the Study:

To estimate the effect of restrictive lockdown measures on air pollution levels in Italy.
To analyze the impact on concentrations of PM10, PM2.5, and NO2.
To assess the broader implications for public health and air quality.

Main Methods:

Utilized time series analysis of weekly air pollutant concentrations.
Examined data for PM10, PM2.5, and NO2 from 2016-2020 across 71 Italian provinces.
Compared pollution levels before and during lockdown periods.

Main Results:

Lockdown measures led to a 17-18% reduction in PM10 concentrations.
Lockdown measures led to a 17-18% reduction in NO2 concentrations.
The impact of lockdowns on PM2.5 concentrations was not clearly determined.

Conclusions:

Restrictive lockdown measures significantly improved air quality in Italy.
The observed reduction in air pollutants suggests a positive impact on public health.
Further research is needed to clarify the effects on PM2.5.