Country comparison · 148 cities measured
Tanzania vs Vietnam Air quality index (AQI) and deforestation
Tanzania has cleaner air than Vietnam right now: its cities average AQI 50 against 58.
Vietnam has lost more forest since 2001. Vietnam 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.
Tanzania50Vietnam58
Head to head
Tanzania vs Vietnam at a glance
Tanzania is ahead on 4 of 5 measures, and Vietnam on 1. The better figure in each row is marked.
| Tanzania | Vietnam | |
|---|---|---|
| Average air qualityUS AQI, all measured cities. | 50 (better) | 58 |
| Cities over AQI 100Not fine for sensitive groups. | 3% (better) | 11% |
| Forest lost since 2001The whole country. | 3.69 million ha (better) | 3.85 million ha |
| Share of its forest lostOf what it had in 2000. | 14% (better) | 23% |
| Average tree coverAcross its measured cities. | 20.7% | 35.8% (better) |
Air quality today
Is Tanzania cleaner than Vietnam?
On air quality, yes, right now. Tanzania has cleaner air than Vietnam right now: its cities average AQI 50 against 58.
3% of the measured cities in Tanzania are over AQI 100 today, the point where the air stops being fine for sensitive groups, against 11% in Vietnam.
How each country's cities split across the air quality bands
Tanzania
- Good16 (47%)
- Moderate17 (50%)
- Unhealthy for sensitive groups1 (3%)
Vietnam
- Good42 (37%)
- Moderate60 (53%)
- Unhealthy for sensitive groups5 (4%)
- Unhealthy7 (6%)
Every measured city, including model estimates where no ground station is near.
Against everywhere else
How do Tanzania and Vietnam compare with other countries?
Right now the cities of Tanzania average cleaner air than 55% of the 171 countries Airleaf has enough cities to average, and those of Vietnam than 39%.
Cleaner air than…
- Tanzania
- Beats 55%
- Vietnam
- Beats 39%
More tree cover than…
- Tanzania
- Beats 41%
- Vietnam
- Beats 79%
Deforestation · 2001–2025
Which country has lost more forest, Tanzania or Vietnam?
Vietnam has lost more: about 3.85 million ha of forest from 2001 to 2025, against 3.69 million ha in Tanzania. 1.41 million ha of Vietnam'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 230,000 ha lost.
Worst year: 2016, with 357,000 ha lost.
| Tanzania | Vietnam | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 3.69 million ha (better) | 3.85 million ha |
| Share of its forestOf what it had in 2000. | 14% (better) | 23% |
| Cleared for goodTurned into farms, mines or towns. | 3.1 million ha | 1.41 million ha (better) |
| Recent trend2021–2025 against the five years before. | Holding steady | Slowing down |
| Main known cause | Farms, pasture and plantations (83%) | Logging (47%) |
Trees
Which country has more tree cover, Tanzania or Vietnam?
Vietnam does: its measured cities average 35.8% tree cover against 20.7%, a gap of 15.0 percentage points.
| Tanzania | Vietnam | |
|---|---|---|
| Trees standingSummed across measured cities. | 2.1M | 12.0M (better) |
| Cities below their targetShort of the canopy target. | 79% | 46% (better) |
| Trees still neededTo reach those targets. | 1.2M (better) | 1.5M |
Behind the averages
The cities behind Tanzania and Vietnam
An average says nothing about how far apart the best and worst places are. These are the measured cities at each end.
Vietnam
- Greenest measured city
- Thị Trấn Thuận Châu82.6% tree cover
- Worst air right now
- Phúc YênAQI 165
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: 34 in Tanzania and 114 in Vietnam, 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. Vietnam rests on 114 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
Tanzania vs Vietnam: your questions answered
Is Tanzania cleaner than Vietnam?
On air quality, yes, right now: Tanzania's cities average AQI 50 against 58 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, Tanzania or Vietnam?
Vietnam has lost more: about 3.85 million ha of forest from 2001 to 2025, against 3.69 million ha in Tanzania. 1.41 million ha of Vietnam'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, Tanzania or Vietnam?
Vietnam does: its measured cities average 35.8% tree cover against 20.7%, a gap of 15.0 percentage points.
How many cities are the Tanzania and Vietnam figures based on?
34 measured cities in Tanzania and 114 in Vietnam. 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 Tanzania and Vietnam?
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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