Restrictions to reduce human interaction have helped to avoid greater suffering and death
from the COVID-19 pandemic, but have also created socioeconomic hardship. This …

In response to the rapid spread of coronavirus disease-2019 (COVID-19) within and across
countries and the need to protect public health, governments worldwide introduced …

Short‑lived climate forcers (SLCFs) affect climate and are, in most cases, also air pollutants.
They include aerosols (sulphate, nitrate, ammonium, carbonaceous aerosols, mineral dust …

The global response to the COVID-19 pandemic has led to a sudden reduction of both GHG
emissions and air pollutants. Here, using national mobility data, we estimate global emission …

The COVID-19 lockdowns led to major reductions in air pollutant emissions. Here, we
quantitatively evaluate changes in ambient NO2, O3, and PM2. 5 concentrations arising from …

This global study, which has been coordinated by the World Meteorological Organization
Global Atmospheric Watch (WMO/GAW) programme, aims to understand the behaviour of …

Surface ozone is a severe air pollution problem in the North China Plain, which is home to
300 million people. Ozone concentrations are highest in summer, driven by fast …

Intensive agricultural activities in the North China Plain (NCP) lead to substantial emissions
of nitrogen oxides (NOx) from soil, while the role of this source on local severe ozone …

Many places on earth still suffer from a high level of atmospheric fine particulate matter
(PM2. 5) pollution. Formation of a particulate pollution event or haze episode (HE) involves …

Stay-at-home policies invoked in response to COVID-19 have led to well-publicized drops in
some air pollutants. The extent to which such reductions translate to improved air quality is …