Figure A. Population-weighted annual average PM2.5 concentrations in 2019. Drag or zoom to explore the data.

Three Decades of Air Pollution

With data going back to 1990, we analyze exposure to three types of air pollution — outdoor fine particulate matter (PM2.5), ozone, and household air pollution (HAP).

  • PM2.5 Exposure

    Exposure to fine-particle outdoor pollution remains persistently high in most places. More than half of the world's population lives in areas that do not even meet WHO's least-stringent air quality target.

  • Ozone Exposure

    Ozone pollution has been slowly but steadily increasing over the past decade. This pollution is accelerated by — and contributes to — climate change.

  • Household Air Pollution Exposure

    Nearly half of all people are exposed to household air pollution from cooking with solid fuels. However, this number is dropping as more homes get access to cleaner energy sources.