Country comparison · 247 cities measured
Algeria vs Japan Air quality index (AQI) and deforestation
Algeria and Japan are level right now: both average AQI 47 across their measured cities.
Japan has lost more forest since 2001. Japan 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.
Algeria47Japan47
Head to head
Algeria vs Japan at a glance
Japan is ahead on 2 of 5 measures, and Algeria on 1. The better figure in each row is marked.
| Algeria | Japan | |
|---|---|---|
| Average air qualityUS AQI, all measured cities. | 47 | 47 |
| Cities over AQI 100Not fine for sensitive groups. | 0% | 0% |
| Forest lost since 2001The whole country. | 234,000 ha (better) | 1.02 million ha |
| Share of its forest lostOf what it had in 2000. | 19% | 3.9% (better) |
| Average tree coverAcross its measured cities. | 8.0% | 16.4% (better) |
Air quality today
Is Algeria cleaner than Japan?
On air quality they are level right now. Algeria and Japan are level right now: both average AQI 47 across their measured cities.
0% of the measured cities in Algeria are over AQI 100 today, the point where the air stops being fine for sensitive groups, against 0% in Japan.
How each country's cities split across the air quality bands
Algeria
- Good27 (68%)
- Moderate13 (33%)
Japan
- Good102 (49%)
- Moderate105 (51%)
Every measured city, including model estimates where no ground station is near.
Against everywhere else
How do Algeria and Japan 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 Japan than 58%.
Cleaner air than…
- Algeria
- Beats 58%
- Japan
- Beats 58%
More tree cover than…
- Algeria
- Beats 16%
- Japan
- Beats 33%
Deforestation · 2001–2025
Which country has lost more forest, Algeria or Japan?
Japan has lost more: about 1.02 million ha of forest from 2001 to 2025, against 234,000 ha in Algeria, or 4.3 times as much. 108,000 ha of Japan'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: 2016, with 54,800 ha lost.
| Algeria | Japan | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 234,000 ha (better) | 1.02 million ha |
| Share of its forestOf what it had in 2000. | 19% | 3.9% (better) |
| Cleared for goodTurned into farms, mines or towns. | 20,600 ha (better) | 108,000 ha |
| Recent trend2021–2025 against the five years before. | Holding steady | Holding steady |
| Main known cause | Wildfires (89%) | Logging (87%) |
Trees
Which country has more tree cover, Algeria or Japan?
Japan does: its measured cities average 16.4% tree cover against 8.0%, a gap of 8.4 percentage points.
| Algeria | Japan | |
|---|---|---|
| Trees standingSummed across measured cities. | 920K | 10.2M (better) |
| Cities below their targetShort of the canopy target. | 98% | 82% (better) |
| Trees still neededTo reach those targets. | 2.7M (better) | 9.6M |
Behind the averages
The cities behind Algeria and Japan
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 207 in Japan, 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. Japan rests on 207 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 Japan: your questions answered
Is Algeria cleaner than Japan?
On air quality they are level right now: both average AQI 47 across their measured cities.
Which country has lost more forest, Algeria or Japan?
Japan has lost more: about 1.02 million ha of forest from 2001 to 2025, against 234,000 ha in Algeria, or 4.3 times as much. 108,000 ha of Japan'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 Japan?
Japan does: its measured cities average 16.4% tree cover against 8.0%, a gap of 8.4 percentage points.
How many cities are the Algeria and Japan figures based on?
40 measured cities in Algeria and 207 in Japan. 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 Japan?
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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