Country comparison · 338 cities measured
Brazil vs Tanzania Air quality index (AQI) and deforestation
Brazil has cleaner air than Tanzania right now: its cities average AQI 36 against 51.
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.
Brazil36Tanzania51
Head to head
Brazil vs Tanzania at a glance
Brazil is ahead on 3 of 5 measures, and Tanzania on 2. The better figure in each row is marked.
| Brazil | Tanzania | |
|---|---|---|
| Average air qualityUS AQI, all measured cities. | 36 (better) | 51 |
| Cities over AQI 100Not fine for sensitive groups. | 0% (better) | 6% |
| Forest lost since 2001The whole country. | 76.6 million ha | 3.69 million ha (better) |
| Share of its forest lostOf what it had in 2000. | 15% | 14% (better) |
| Average tree coverAcross its measured cities. | 26.2% (better) | 20.7% |
Air quality today
Is Brazil cleaner than Tanzania?
On air quality, yes, right now. Brazil has cleaner air than Tanzania right now: its cities average AQI 36 against 51.
0% of the measured cities in Brazil are over AQI 100 today, the point where the air stops being fine for sensitive groups, against 6% in Tanzania.
How each country's cities split across the air quality bands
Brazil
- Good206 (68%)
- Moderate97 (32%)
- Unhealthy for sensitive groups1 (0%)
Tanzania
- Good16 (47%)
- Moderate16 (47%)
- Unhealthy for sensitive groups2 (6%)
Every measured city, including model estimates where no ground station is near.
Against everywhere else
How do Brazil and Tanzania compare with other countries?
Right now the cities of Brazil average cleaner air than 78% of the 171 countries Airleaf has enough cities to average, and those of Tanzania than 52%.
Cleaner air than…
- Brazil
- Beats 78%
- Tanzania
- Beats 52%
More tree cover than…
- Brazil
- Beats 55%
- Tanzania
- Beats 42%
Deforestation · 2001–2025
Which country has lost more forest, Brazil or Tanzania?
Brazil has lost more: about 76.6 million ha of forest from 2001 to 2025, against 3.69 million ha in Tanzania, or 21 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: 2023, with 230,000 ha lost.
| Brazil | Tanzania | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 76.6 million ha | 3.69 million ha (better) |
| Share of its forestOf what it had in 2000. | 15% | 14% (better) |
| Cleared for goodTurned into farms, mines or towns. | 56.2 million ha | 3.1 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 (83%) |
Trees
Which country has more tree cover, Brazil or Tanzania?
Brazil does: its measured cities average 26.2% tree cover against 20.7%, a gap of 5.5 percentage points.
| Brazil | Tanzania | |
|---|---|---|
| Trees standingSummed across measured cities. | 23.7M (better) | 2.1M |
| Cities below their targetShort of the canopy target. | 68% (better) | 79% |
| Trees still neededTo reach those targets. | 7.3M | 1.2M (better) |
Behind the averages
The cities behind Brazil and Tanzania
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
- ManausAQI 140
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 34 in Tanzania, 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 34, 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 Tanzania: your questions answered
Is Brazil cleaner than Tanzania?
On air quality, yes, right now: Brazil's cities average AQI 36 against 51 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, Brazil or Tanzania?
Brazil has lost more: about 76.6 million ha of forest from 2001 to 2025, against 3.69 million ha in Tanzania, or 21 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 Tanzania?
Brazil does: its measured cities average 26.2% tree cover against 20.7%, a gap of 5.5 percentage points.
How many cities are the Brazil and Tanzania figures based on?
304 measured cities in Brazil and 34 in Tanzania. 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 Brazil and Tanzania?
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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