… -2 coronavirus in Wuhan, China late December 2019 and the ongoing COVID-19 pandemic
… deaths in 188 countries 1 and poses a major global threat to population health in centuries. …

… and economic activities in cities, they are often hotspots of COVID-19 infections. … COVID-19
on cities. In this study we seek to provide an overview of COVID-19 research related to cities …

… Therefore to investigate the global impact of lockdown on air quality during the COVID-19
pandemic, cities from different continents have been selected. In this study, 12 major cities …

… The daily median AQI was used in this study for each of 20 major cities. … A significant impact
of the COVID-19 lockdown on air quality was found in 20 major cities, including significant …

… COVID-19 cases in 43 major cities. When Wuhan was quarantined from 23 January 2020,
the cumulative number of confirmed COVID-19 cases in these major cities … COVID-19 cases (…

… The figures in this paper show the temporary environmental benefit as a major positive
impact and as a learning model for governments to enable new socio-environmental policies. …

… the spread of COVID-19. The … major cities (New York, Los Angeles, Zaragoza, Rome, Dubai,
Delhi, Mumbai, Beijing and Shanghai) around the world suffered severely with the COVID-19…

… We selected 40 major cities around the world (Figure 1) based on (i) the historical level of …
in the city (a mix of cities with dirty and clean air), (ii) reported COVID-19 cases in that city (a …

… confirmed cases with meteorological parameters and criteria pollutants in the major cities
of … that the COVID-19 lockdown has drastically improved the quality of air in major cities of …

… This study signifies the effect of climate factors on COVID-19 incidence and mortality rate,
but … the COVID-19 incidence, mortality ratesand meteorological factors among major cities in …