Baía Farta vs Masina
Tree cover and air quality for both, measured the same way: Sentinel-2 imagery at 10 m detail over a 2 km radius from each city centre, and the live US EPA air quality index. Same radius and same index, so the two numbers compare directly.
Masina has more tree cover — 23.9% against 1.0%.
Baía Farta has cleaner air right now — AQI 40 against 192.
- Tree cover gap
- 22.9 points
- Masina is ahead.
- Air quality gap
- 152 AQI
- Baía Farta is cleaner.
- Trees between them
- 73.8K
- Masina has more standing.
Angola
Democratic Republic of the Congo
Tree cover
Share of the 2 km radius under canopy.
1.0%
23.9%
Air quality index
US EPA index, live, with its band. Lower is better.
40 · Good
192 · Unhealthy
Trees standing
Estimated from the measured canopy area.
1.3K
75.1K
Trees still needed
To reach the same canopy target. Fewer is better.
37.3K
50.6K
CO₂ absorbed each year
By the trees already standing.
28.3K kg
1.7M kg
Air quality in detail
What each city is breathing
Concentrations in µg/m³, measured at the same moment as the index above. Lower is better in every row. Masina is read from nearby ground stations and Baía Farta is modelled — worth knowing, since the two are not quite like for like.
PM2.5
Fine particles, the pollutant that usually sets the index.
9.7 µg/m³
135.2 µg/m³
The last week, day by day
A single reading can catch a city on a bad afternoon. The week says whether it was the weather or the place.
| Day | Baía Farta | Masina |
|---|---|---|
| 23 Sept | 54 | 119 |
| 24 Sept | 56 | 148 |
| 25 Sept | 53 | 137 |
| 26 Sept | 43 | 116 |
| 27 Sept | 50 | 93 |
| 28 Sept | 43 | 91 |
| 29 Sept | 38 | 93 |
Reading these numbers
What is actually being measured
Tree cover
The share of ground under canopy inside a 2 km radius of each city centre, read from Sentinel-2 satellite imagery at 10 m detail. It is a measurement of that circle, not of the whole municipality — which is exactly what makes the two comparable, since city boundaries are drawn to wildly different rules around the world. Masina leads here at 23.9%.
Air quality index
The live US EPA index, computed from current pollutant concentrations — ground stations where a city has them nearby, and a model everywhere else. It moves hour to hour, so this is a snapshot rather than a verdict on either place: Baía Farta reads 40 (good) and Masina reads 192 (unhealthy) right now.
Frequently asked
Baía Farta and Masina, answered
Which has more trees, Baía Farta or Masina?
Masina, with roughly 75,084 trees inside its 2 km radius against 1,285. Tree cover tells a slightly different story from raw count: Masina has the denser canopy at 23.9%.
Which has better air quality, Baía Farta or Masina?
Baía Farta right now, at AQI 40 against 192 — a gap of 152 points. This is a live reading rather than an annual average, so it can reverse within a day.
How many more trees does each city need?
Baía Farta needs about 37,262 more to reach its canopy target, and Masina about 50,580. The target is the same share of ground for both, so the figures are directly comparable.
Are these two measured the same way?
Yes — that is the point of the page. Identical radius, identical satellite source at 10 m detail, and the same US EPA index for air. Nothing here is adjusted for population, city limits or climate, so the numbers describe the same-sized circle of ground in each place.
Keep going
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