Fig. 5: The spatial distribution of the changes in PWE among the Chinese population due to responses to COVID-19.
From: Increased air pollution exposure among the Chinese population during the national quarantine in 2020
Changes in ambient and indoor air quality, population migration and time spent indoors are considered. The PWE changes are illustrated by county. The white line marks China’s Qinling Mountains–Huai River Line (Qin–Huai Line) Qin–Huai Line divides China into two regions that differ in climate and is commonly used as a reference line in policy-making to determine the heating (northern) and non-heating (southern) regions56. The map of China map is from Harvard Dataverse and is publicly available under the Creative Commons CC0 Public Domain Dedication57.
