Country comparison · 158 cities measured
Canada vs Nigeria Air quality index (AQI) and deforestation
Canada has cleaner air than Nigeria right now: its cities average AQI 25 against 103.
At ground stations alone, which measure rather than estimate, the averages are Canada 26 (58 cities) and Nigeria 70 (13 cities). Canada has lost more forest since 2001. Canada 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.
Canada25Nigeria103
Head to head
Canada vs Nigeria at a glance
Canada is ahead on 4 of 6 measures, and Nigeria on 2. The better figure in each row is marked.
| Canada | Nigeria | |
|---|---|---|
| Average air qualityUS AQI, all measured cities. | 25 (better) | 103 |
| At ground stationsCities with a current station reading. | 26 (better) | 70 |
| Cities over AQI 100Not fine for sensitive groups. | 0% (better) | 39% |
| Forest lost since 2001The whole country. | 65.6 million ha | 1.56 million ha (better) |
| Share of its forest lostOf what it had in 2000. | 17% | 16% (better) |
| Average tree coverAcross its measured cities. | 33.1% (better) | 19.4% |
Air quality today
Is Canada cleaner than Nigeria?
On air quality, yes, right now. Canada has cleaner air than Nigeria right now: its cities average AQI 25 against 103.
At ground stations alone, which measure rather than estimate, the averages are Canada 26 (58 cities) and Nigeria 70 (13 cities).
0% of the measured cities in Canada 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
Canada
- Good55 (93%)
- Moderate4 (7%)
Nigeria
- Good3 (3%)
- Moderate57 (58%)
- Unhealthy for sensitive groups28 (28%)
- Unhealthy10 (10%)
- Very unhealthy1 (1%)
Every measured city, including model estimates where no ground station is near.
Against everywhere else
How do Canada and Nigeria compare with other countries?
Right now the cities of Canada average cleaner air than 91% of the 171 countries Airleaf has enough cities to average, and those of Nigeria than 5%.
Cleaner air than…
- Canada
- Beats 91%
- Nigeria
- Beats 5%
More tree cover than…
- Canada
- Beats 74%
- Nigeria
- Beats 39%
Deforestation · 2001–2025
Which country has lost more forest, Canada or Nigeria?
Canada has lost more: about 65.6 million ha of forest from 2001 to 2025, against 1.56 million ha in Nigeria, or 42 times as much. 899,000 ha of Canada'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: 2023, with 8.38 million ha lost.
Worst year: 2017, with 172,000 ha lost.
| Canada | Nigeria | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 65.6 million ha | 1.56 million ha (better) |
| Share of its forestOf what it had in 2000. | 17% | 16% (better) |
| Cleared for goodTurned into farms, mines or towns. | 899,000 ha (better) | 1.44 million ha |
| Recent trend2021–2025 against the five years before. | Speeding up | Holding steady |
| Main known cause | Wildfires (60%) | Farms, pasture and plantations (87%) |
Trees
Which country has more tree cover, Canada or Nigeria?
Canada does: its measured cities average 33.1% tree cover against 19.4%, a gap of 13.7 percentage points.
| Canada | Nigeria | |
|---|---|---|
| Trees standingSummed across measured cities. | 5.8M | 5.8M (better) |
| Cities below their targetShort of the canopy target. | 41% (better) | 82% |
| Trees still neededTo reach those targets. | 447K (better) | 5.5M |
Behind the averages
The cities behind Canada and Nigeria
An average says nothing about how far apart the best and worst places are. These are the measured cities at each end.
Canada
- Greenest measured city
- Saint-Louis-de-Terrebonne68.1% tree cover
- Worst air right now
- SaskatoonAQI 74
Nigeria
- Greenest measured city
- Efon-Alaaye76.1% tree cover
- Worst air right now
- IbadanAQI 112
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: 59 in Canada 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 59, so its average is the steadier of the two. Forest figures come from the University of Maryland's Global Forest Change maps.
Frequently asked
Canada vs Nigeria: your questions answered
Is Canada cleaner than Nigeria?
On air quality, yes, right now: Canada's cities average AQI 25 against 103 on the US EPA index. These are live readings averaged across cities, so the gap moves with the weather. At ground stations alone, which measure rather than estimate, the averages are Canada 26 (58 cities) and Nigeria 70 (13 cities).
Which country has lost more forest, Canada or Nigeria?
Canada has lost more: about 65.6 million ha of forest from 2001 to 2025, against 1.56 million ha in Nigeria, or 42 times as much. 899,000 ha of Canada'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, Canada or Nigeria?
Canada does: its measured cities average 33.1% tree cover against 19.4%, a gap of 13.7 percentage points.
How many cities are the Canada and Nigeria figures based on?
59 measured cities in Canada 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.
Why are there two air quality averages for each country?
The first covers every measured city, using a ground station where one is close and a model estimate everywhere else. The second counts only cities with a current station reading, which is measured rather than estimated but covers fewer places. Airleaf's world rankings use the station figures only.
Does this cover the whole of Canada 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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