Country comparison · 139 cities measured
Algeria vs Nigeria Air quality index (AQI) and deforestation
Algeria has cleaner air than Nigeria right now: its cities average AQI 47 against 101.
Nigeria has lost more forest since 2001. Nigeria has more tree cover in its cities.
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Algeria47Nigeria101
Head to head
Algeria vs Nigeria at a glance
Algeria is ahead on 3 of 5 measures, and Nigeria on 2. The better figure in each row is marked.
| Algeria | Nigeria | |
|---|---|---|
| Average air qualityUS AQI, all measured cities. | 47 (better) | 101 |
| Cities over AQI 100Not fine for sensitive groups. | 0% (better) | 39% |
| Forest lost since 2001The whole country. | 234,000 ha (better) | 1.56 million ha |
| Share of its forest lostOf what it had in 2000. | 19% | 16% (better) |
| Average tree coverAcross its measured cities. | 8.0% | 19.4% (better) |
Air quality today
Is Algeria cleaner than Nigeria?
On air quality, yes, right now. Algeria has cleaner air than Nigeria right now: its cities average AQI 47 against 101.
0% of the measured cities in Algeria are over AQI 100 today, the point where the air stops being fine for sensitive groups, against 39% in Nigeria.
How each country's cities split across the air quality bands
Algeria
- Good27 (68%)
- Moderate13 (33%)
Nigeria
- Good2 (2%)
- Moderate58 (59%)
- Unhealthy for sensitive groups29 (29%)
- Unhealthy9 (9%)
- Very unhealthy1 (1%)
Every measured city, including model estimates where no ground station is near.
Against everywhere else
How do Algeria and Nigeria compare with other countries?
Right now the cities of Algeria average cleaner air than 58% of the 171 countries Airleaf has enough cities to average, and those of Nigeria than 6%.
Cleaner air than…
- Algeria
- Beats 58%
- Nigeria
- Beats 6%
More tree cover than…
- Algeria
- Beats 16%
- Nigeria
- Beats 39%
Deforestation · 2001–2025
Which country has lost more forest, Algeria or Nigeria?
Nigeria has lost more: about 1.56 million ha of forest from 2001 to 2025, against 234,000 ha in Algeria, or 6.7 times as much. 1.44 million ha of Nigeria's was cleared for good, for farms, mines or towns; the rest burned, was logged or can grow back.
The whole country, from the yearly satellite maps of forest loss: unlike the city averages above, this counts every forest, not just the land around cities.
Worst year: 2017, with 44,700 ha lost.
Worst year: 2017, with 172,000 ha lost.
| Algeria | Nigeria | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 234,000 ha (better) | 1.56 million ha |
| Share of its forestOf what it had in 2000. | 19% | 16% (better) |
| Cleared for goodTurned into farms, mines or towns. | 20,600 ha (better) | 1.44 million ha |
| Recent trend2021–2025 against the five years before. | Holding steady | Holding steady |
| Main known cause | Wildfires (89%) | Farms, pasture and plantations (87%) |
Trees
Which country has more tree cover, Algeria or Nigeria?
Nigeria does: its measured cities average 19.4% tree cover against 8.0%, a gap of 11.4 percentage points.
| Algeria | Nigeria | |
|---|---|---|
| Trees standingSummed across measured cities. | 920K | 5.8M (better) |
| Cities below their targetShort of the canopy target. | 98% | 83% (better) |
| Trees still neededTo reach those targets. | 2.7M (better) | 5.3M |
Behind the averages
The cities behind Algeria and Nigeria
An average says nothing about how far apart the best and worst places are. These are the measured cities at each end.
Nigeria
- Greenest measured city
- Efon-Alaaye76.1% tree cover
- Worst air right now
- NsukkaAQI 151
Reading these numbers
What a country average is, and is not
It is a mean of cities
Not a national statistic. Each figure is the average across the cities Airleaf has measured: 40 in Algeria and 99 in Nigeria, each read over the same 2 km radius, on the US EPA index. Rural land and unmeasured towns are not in it.
Coverage shapes the number
A country measured mostly in its capital reads differently from one measured across dozens of towns. Nigeria rests on 99 cities against 40, so its average is the steadier of the two. Forest figures come from the University of Maryland's Global Forest Change maps.
Frequently asked
Algeria vs Nigeria: your questions answered
Is Algeria cleaner than Nigeria?
On air quality, yes, right now: Algeria's cities average AQI 47 against 101 on the US EPA index. These are live readings averaged across cities, so the gap moves with the weather.
Which country has lost more forest, Algeria or Nigeria?
Nigeria has lost more: about 1.56 million ha of forest from 2001 to 2025, against 234,000 ha in Algeria, or 6.7 times as much. 1.44 million ha of Nigeria's was cleared for good, for farms, mines or towns; the rest burned, was logged or can grow back.
Which country has more tree cover, Algeria or Nigeria?
Nigeria does: its measured cities average 19.4% tree cover against 8.0%, a gap of 11.4 percentage points.
How many cities are the Algeria and Nigeria figures based on?
40 measured cities in Algeria and 99 in Nigeria. Every one was read the same way, so the two averages are directly comparable, but a country with more measured cities has the more settled figure.
Does this cover the whole of Algeria and Nigeria?
The air and tree figures are not: they are the cities Airleaf has measured, each over the same 2 km radius, so treat them as a comparison of urban air and urban tree cover. The forest figures are: they count every forest in the country.
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