Country comparison
Egypt vs Nigeria
Averaged across every city Airleaf has measured in each country — 65 in Egypt and 57 in Nigeria — 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.
Nigeria averages more tree cover — 33.4% against 19.7%.
Nigeria averages cleaner air — AQI 52 against 114.
- Tree cover gap
- 13.7 points
- Nigeria is ahead.
- Air quality gap
- 62 AQI
- Nigeria is cleaner.
- Cities behind it
- 65 vs 57
- How much each average rests on.
Average tree cover
Mean across measured cities, each over the same 2 km radius.
19.7%
33.4%
Average air quality index
US EPA index. Lower is better.
114
52
Cities measured
How much each average rests on.
65
57
Trees still needed
Summed across measured cities, to reach their canopy targets. Fewer is better.
2.8M
1.1M
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.
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 — 65 in Egypt and 57 in Nigeria — 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. Egypt rests on 65 cities against 57, so its average is the steadier of the two. Both firm up as coverage grows.
Frequently asked
Egypt and Nigeria, answered
Which country has more tree cover, Egypt or Nigeria?
Nigeria, averaging 33.4% across its measured cities against 19.7% — a gap of 13.7 percentage points.
Which has cleaner air, Egypt or Nigeria?
Nigeria, averaging AQI 52 against 114 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?
65 measured cities in Egypt and 57 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.
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.
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