![Global distribution of daily 1-km gapless PM2.5 on 8 October 2020 (unit: μg m-3) at a 1 km spatial resolution and zoomed-in maps showing ground-based measurements (colored dots) over the (a) western United States, (b) central South America, (c) eastern United States, (d) Europe, (e) northwestern Africa, (f) Australia, (g) India, and (h) eastern China.](https://essic.umd.edu/wp-content/uploads/2023/12/Updated-Figure-2-scaled.jpg)
UMD Researchers Assess the Impact of Air Quality on the Mortality around the World and COVID-19
University of Maryland researchers have developed the world’s first daily 1-kilometer seamless product of PM2.5— fine particulate matter that threatens human respiratory health — that logs the progression of the world’s air quality since 2017.