Country comparison · 96 cities measured
Algeria vs South Korea Air quality index (AQI) and deforestation
Algeria has cleaner air than South Korea right now: its cities average AQI 47 against 80.
South Korea has lost more forest since 2001. South Korea has more tree cover in its cities.
Average of 40 cities
AQI 47
Good
Cleaner on average
- Tree cover
- 8.0%
- Forest lost since 2001
- 234,000 ha
Average of 56 cities
AQI 80
Moderate
Cleaner on average
- At ground stations
- AQI 80
- Tree cover
- 28.4%
- Forest lost since 2001
- 436,000 ha
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Algeria47South Korea80
Head to head
Algeria vs South Korea at a glance
Algeria is ahead on 3 of 5 measures, and South Korea on 2. The better figure in each row is marked.
| Algeria | South Korea | |
|---|---|---|
| Average air qualityUS AQI, all measured cities. | 47 (better) | 80 |
| Cities over AQI 100Not fine for sensitive groups. | 0% (better) | 9% |
| Forest lost since 2001The whole country. | 234,000 ha (better) | 436,000 ha |
| Share of its forest lostOf what it had in 2000. | 19% | 8.2% (better) |
| Average tree coverAcross its measured cities. | 8.0% | 28.4% (better) |
Air quality today
Is Algeria cleaner than South Korea?
On air quality, yes, right now. Algeria has cleaner air than South Korea right now: its cities average AQI 47 against 80.
0% of the measured cities in Algeria are over AQI 100 today, the point where the air stops being fine for sensitive groups, against 9% in South Korea.
How each country's cities split across the air quality bands
Algeria
- Good27 (68%)
- Moderate13 (33%)
South Korea
- Good1 (2%)
- Moderate50 (89%)
- Unhealthy for sensitive groups5 (9%)
Every measured city, including model estimates where no ground station is near.
Against everywhere else
How do Algeria and South Korea 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 South Korea than 14%.
Cleaner air than…
- Algeria
- Beats 58%
- South Korea
- Beats 14%
More tree cover than…
- Algeria
- Beats 16%
- South Korea
- Beats 64%
Deforestation · 2001–2025
Which country has lost more forest, Algeria or South Korea?
South Korea has lost more: about 436,000 ha of forest from 2001 to 2025, against 234,000 ha in Algeria, or 1.9 times as much. 67,300 ha of South Korea'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: 2025, with 87,000 ha lost.
| Algeria | South Korea | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 234,000 ha (better) | 436,000 ha |
| Share of its forestOf what it had in 2000. | 19% | 8.2% (better) |
| Cleared for goodTurned into farms, mines or towns. | 20,600 ha (better) | 67,300 ha |
| Recent trend2021–2025 against the five years before. | Holding steady | Speeding up |
| Main known cause | Wildfires (89%) | Logging (70%) |
Trees
Which country has more tree cover, Algeria or South Korea?
South Korea does: its measured cities average 28.4% tree cover against 8.0%, a gap of 20.4 percentage points.
| Algeria | South Korea | |
|---|---|---|
| Trees standingSummed across measured cities. | 920K | 4.8M (better) |
| Cities below their targetShort of the canopy target. | 98% | 57% (better) |
| Trees still neededTo reach those targets. | 2.7M | 1.3M (better) |
Behind the averages
The cities behind Algeria and South Korea
An average says nothing about how far apart the best and worst places are. These are the measured cities at each end.
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 56 in South Korea, 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. South Korea rests on 56 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 South Korea: your questions answered
Is Algeria cleaner than South Korea?
On air quality, yes, right now: Algeria's cities average AQI 47 against 80 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 South Korea?
South Korea has lost more: about 436,000 ha of forest from 2001 to 2025, against 234,000 ha in Algeria, or 1.9 times as much. 67,300 ha of South Korea'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 South Korea?
South Korea does: its measured cities average 28.4% tree cover against 8.0%, a gap of 20.4 percentage points.
How many cities are the Algeria and South Korea figures based on?
40 measured cities in Algeria and 56 in South Korea. 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 South Korea?
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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