Sponsored by: BAE Systems. Outdoor air pollution is a leading cause of premature fatalities, resulting in more than four million early deaths every year. To make informed decisions about how to effectively address air pollution, high quality global data at a high cadence are critical to understand the pollutants, their evolution over time, and measure the efficacy of mitigations. A global air quality monitoring concept is now becoming a reality, with two satellites on-orbit (TEMPO and GEMS) and one launching later this year (Sentinel-4), in the northern hemisphere. Satellites covering the Middle East/North Africa region, Sub-Saharan Africa, and South America are critical components in building the Southern Hemisphere portion of the Global Network. Partnerships to develop these missions will include satellite development, mission operations control centers, and the respective regional science teams. We invite all those interested in supporting mission development, across all components, regions and phases, to join our global collaboration.