For each country/region, a table per pollutant is generated with a link to each paper, the first author name, observation period, reported relative changes, and absolute pollutant concentrations.

* Country/Region refers to countries following the United Nations definition and classification as well as dependencies and other territories as found here

For each pollutant, plots of the relative change [%] per region and country are generated following Gkatzelis et al. (2021).