Country comparison · 403 cities measured
Brazil vs Nigeria Air quality index (AQI) and deforestation
Brazil has cleaner air than Nigeria right now: its cities average AQI 37 against 101.
At ground stations alone, which measure rather than estimate, the averages are Brazil 46 (60 cities) and Nigeria 81 (13 cities). Brazil has lost more forest since 2001. Brazil 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.
Brazil37Nigeria101
Head to head
Brazil vs Nigeria at a glance
Brazil is ahead on 5 of 6 measures, and Nigeria on 1. The better figure in each row is marked.
| Brazil | Nigeria | |
|---|---|---|
| Average air qualityUS AQI, all measured cities. | 37 (better) | 101 |
| At ground stationsCities with a current station reading. | 46 (better) | 81 |
| Cities over AQI 100Not fine for sensitive groups. | 1% (better) | 39% |
| Forest lost since 2001The whole country. | 76.6 million ha | 1.56 million ha (better) |
| Share of its forest lostOf what it had in 2000. | 15% (better) | 16% |
| Average tree coverAcross its measured cities. | 26.2% (better) | 19.4% |
Air quality today
Is Brazil cleaner than Nigeria?
On air quality, yes, right now. Brazil has cleaner air than Nigeria right now: its cities average AQI 37 against 101.
At ground stations alone, which measure rather than estimate, the averages are Brazil 46 (60 cities) and Nigeria 81 (13 cities).
1% of the measured cities in Brazil 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
Brazil
- Good207 (68%)
- Moderate93 (31%)
- Unhealthy for sensitive groups3 (1%)
- Unhealthy1 (0%)
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 Brazil and Nigeria compare with other countries?
Right now the cities of Brazil average cleaner air than 75% of the 171 countries Airleaf has enough cities to average, and those of Nigeria than 6%.
Cleaner air than…
- Brazil
- Beats 75%
- Nigeria
- Beats 6%
More tree cover than…
- Brazil
- Beats 55%
- Nigeria
- Beats 39%
Deforestation · 2001–2025
Which country has lost more forest, Brazil or Nigeria?
Brazil has lost more: about 76.6 million ha of forest from 2001 to 2025, against 1.56 million ha in Nigeria, or 49 times as much. 56.2 million ha of Brazil'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: 2016, with 5.41 million ha lost.
Worst year: 2017, with 172,000 ha lost.
| Brazil | Nigeria | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 76.6 million ha | 1.56 million ha (better) |
| Share of its forestOf what it had in 2000. | 15% (better) | 16% |
| Cleared for goodTurned into farms, mines or towns. | 56.2 million ha | 1.44 million ha (better) |
| Recent trend2021–2025 against the five years before. | Holding steady | Holding steady |
| Main known cause | Farms, pasture and plantations (73%) | Farms, pasture and plantations (87%) |
Trees
Which country has more tree cover, Brazil or Nigeria?
Brazil does: its measured cities average 26.2% tree cover against 19.4%, a gap of 6.8 percentage points.
| Brazil | Nigeria | |
|---|---|---|
| Trees standingSummed across measured cities. | 23.7M (better) | 5.8M |
| Cities below their targetShort of the canopy target. | 68% (better) | 83% |
| Trees still neededTo reach those targets. | 7.4M | 5.3M (better) |
Behind the averages
The cities behind Brazil and Nigeria
An average says nothing about how far apart the best and worst places are. These are the measured cities at each end.
Brazil
- Greenest measured city
- Petrópolis73.8% tree cover
- Worst air right now
- Duque de CaxiasAQI 185
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: 304 in Brazil 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. Brazil rests on 304 cities against 99, so its average is the steadier of the two. Forest figures come from the University of Maryland's Global Forest Change maps.
Frequently asked
Brazil vs Nigeria: your questions answered
Is Brazil cleaner than Nigeria?
On air quality, yes, right now: Brazil's cities average AQI 37 against 101 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 Brazil 46 (60 cities) and Nigeria 81 (13 cities).
Which country has lost more forest, Brazil or Nigeria?
Brazil has lost more: about 76.6 million ha of forest from 2001 to 2025, against 1.56 million ha in Nigeria, or 49 times as much. 56.2 million ha of Brazil'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, Brazil or Nigeria?
Brazil does: its measured cities average 26.2% tree cover against 19.4%, a gap of 6.8 percentage points.
How many cities are the Brazil and Nigeria figures based on?
304 measured cities in Brazil 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 Brazil 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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