Abstract During 2020, the COVID-19 pandemic resulted in a widespread lockdown in many
cities in China. In this study, we assessed the impact of changes in human activities on air …

The outbreak of 2019 novel coronavirus (COVID-19) has hugely impacted the world and
becomes a global public threat. To prevent the spread of COVID-19, human activities are …

The pandemic of coronavirus disease 2019 (COVID-19) resulted in a stringent lockdown in
China to reduce the infection rate. We adopted a machine learning technique to analyze the …

ABSTRACT In early 2020, the COVID-19 epidemic spread globally. This study investigated
the air quality of three cities in Hubei Province, Wuhan, Jingmen, and Enshi, central China …

As a result of the lockdown (LD) control measures enacted to curtail the COVID-19
pandemic in Wuhan, almost all non-essential human activities were halted beginning on …

Understanding the relationship between air quality, pollution emission control measures,
and meteorological conditions is important for developing effective air quality improvement …

A series of strict lockdown measures were implemented in the areas of China worst affected
by coronavirus disease 19, including Wuhan, to prevent the disease spreading. The …

In recent decades, air pollution has become an important environmental problem in the
megacities of eastern China. How to control air pollution in megacities is still a challenging …

Measures taken to control the disease (Covid-19) caused by the novel coronavirus
dramatically reduced the number of vehicles on the road and diminished factory production …

Both the air quality index (AQI) and indicatory air pollutants of Anqing, Hefei, and Suzhou
near central China from 2017 to 2019, and the impact of COVID-19 epidemic prevention and …