The city of Nairobi is facing a growing environmental crisis: unplanned urban expansion, increased traffic, and industrial activity are deteriorating air quality for more than 4 million people. This infographic shows how air pollution disproportionately affects children and how 93% of the population breathes air that exceeds safe limits. It also highlights collaborative initiatives that strengthen air monitoring through low-cost sensors, open data, and community participation, and presents key lessons for other cities aiming to build effective, multisectoral data ecosystems.
