How clean is the air you breathe? This second issue of the State of Global Air report expands on last year’s report by adding household air pollution and total air pollution to our discussion of air quality and health for all countries around the globe. It is based on the most recent data available (for 2016) and provides a comprehensive picture of global air pollution and health levels and trends (since 1990). Who is it for? The report is designed to introduce citizens, journalists, policy makers, and scientists to the Global Burden of Disease project, a comprehensive effort to estimate and track human exposure to air pollution and its impact on human health around the world. How can I explore the data? The interactive pages of this website provide the tools to explore, compare, and download data tables and graphics with the latest air pollution levels and the associated burden of disease in individual countries, as well as their trends over the last 26 years (1990–2016).