🗺 World Map

The world map visualises Air Pollution (PM2.5) (µg/m³) for 2019, shading each country by value so regional patterns stand out at a glance. Use the year slider to replay the data back to 1960, and click any country to load its historical trend.

📈 Over Time

The line chart tracks Air Pollution (PM2.5) (µg/m³) over time for a custom set of countries or regions. Add or remove countries with the selector above the chart. Inflection points often reveal recessions, policy reforms, or major global events.

🏆 Ranking

The ranking chart shows most polluted countries (pm2.5) as of 2019 (or the latest available year). The default view covers the top 20 countries; expand to the full global ranking with the "Show all countries" button.

In 2019, Qatar led the world in air pollution (pm2.5) at 81.0 µg/m³, followed by Niger (72.5 µg/m³) and Mauritania (72.2 µg/m³). Finland ranked last at 5.4 µg/m³ — 15× below Qatar.