Country comparison
Brazil vs Poland
Averaged across every city Airleaf has measured in each country — 304 in Brazil and 39 in Poland — each read the same way: Sentinel-2 imagery at 10 m detail over a 2 km radius, and the live US EPA air quality index.
Poland averages more tree cover — 52.9% against 30.3%.
Poland averages cleaner air — AQI 60 against 65.
- Tree cover gap
- 22.6 points
- Poland is ahead.
- Air quality gap
- 5 AQI
- Poland is cleaner.
- Cities behind it
- 304 vs 39
- How much each average rests on.
Average tree cover
Mean across measured cities, each over the same 2 km radius.
30.3%
52.9%
Average air quality index
US EPA index. Lower is better.
65
60
Cities measured
How much each average rests on.
304
39
Trees still needed
Summed across measured cities, to reach their canopy targets. Fewer is better.
7.1M
1.2K
Behind the averages
The extremes in each country
An average says nothing about how far apart the best and worst places are. These are the measured cities at each end.
Poland
- Greenest measured city
- Wałbrzych79.7% tree cover
- Worst air right now
- CzęstochowaAQI 91
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 in that country — 304 in Brazil and 39 in Poland — each read over the same 2 km radius. Rural land, forest and everywhere unmeasured are not in it, so this compares urban areas rather than territories.
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 39, so its average is the steadier of the two. Both firm up as coverage grows.
Frequently asked
Brazil and Poland, answered
Which country has more tree cover, Brazil or Poland?
Poland, averaging 52.9% across its measured cities against 30.3% — a gap of 22.6 percentage points.
Which has cleaner air, Brazil or Poland?
Poland, averaging AQI 60 against 65 on the US EPA index. These are live readings averaged across cities, so the gap moves with the weather.
How many cities is each figure based on?
304 measured cities in Brazil and 39 in Poland. 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.
Is this the whole country?
No. It is the cities Airleaf has measured, each over a 2 km radius from its centre. Forest, farmland and unmeasured towns are not included, so treat this as a comparison of urban tree cover and urban air rather than of national land cover.
Build your own
Compare Brazil with somewhere else
This place
Brazil