Namibia vs Sierra Leone: Exposure to air pollution from human sources
Exposure to air pollution from human sources over time
- Namibia
- Sierra Leone
How they compare
Sierra Leone currently reports 14.74 micrograms per cubic meter against 14.53 micrograms per cubic meter in Namibia, a difference of 0.21 micrograms per cubic meter.
The two have swapped places 6 times across 27 shared years of data; in 1998 it was Sierra Leone ahead.
Namibia ranks 97th and Sierra Leone ranks 95th of 240 countries.
Sierra Leone has averaged higher in every one of the 4 decades both report.
Head to head by decade
| Decade | Namibia | Sierra Leone | Difference | Ahead |
|---|---|---|---|---|
| 1990s | 12.29 micrograms per cubic meter | 20.25 micrograms per cubic meter | 7.97 micrograms per cubic meter | Sierra Leone |
| 2000s | 13.17 micrograms per cubic meter | 14.87 micrograms per cubic meter | 1.7 micrograms per cubic meter | Sierra Leone |
| 2010s | 12.31 micrograms per cubic meter | 14.38 micrograms per cubic meter | 2.07 micrograms per cubic meter | Sierra Leone |
| 2020s | 12.65 micrograms per cubic meter | 13.38 micrograms per cubic meter | 0.722 micrograms per cubic meter | Sierra Leone |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher exposure to air pollution from human sources, Namibia or Sierra Leone?
- Sierra Leone, at 14.74 micrograms per cubic meter against 14.53 micrograms per cubic meter in Namibia as of 2024.
- What is the difference in exposure to air pollution from human sources between Namibia and Sierra Leone?
- 0.21 micrograms per cubic meter, with Sierra Leone ahead.
- How many years of comparable data are there for Namibia and Sierra Leone?
- 27 years are reported by both, from 1998 to 2024.
- How do Namibia and Sierra Leone rank globally for exposure to air pollution from human sources?
- Namibia ranks 97th and Sierra Leone ranks 95th of 240 countries.
- Where does this data come from?
- Energy Policy Institute at the University of Chicago (EPIC) (2026) – with minor processing by Our World in Data, published as Exposure to air pollution from human sources. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Annual population-weighted average concentration of fine particulate matter (PM2.5) in the air, measured in micrograms per cubic meter (µg/m³). Fine particulate matter (PM2.5) are particles with a diameter of 2.5 micrometers or less, which can pose significant health risks. This data excludes natural sources of PM2.5, such as dust and sea salt, to focus on human-caused pollution.