City report · Comoros
Fomboni Air quality today
Air quality in Fomboni currently reads AQI 25 (Good): Air quality is satisfactory for everyone.
AQI 25
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 3.9
- tree cover
- 60.8%
- trees in this area
- 125K
- more trees needed
- 0
Measured across a 2 km radius around Fomboni, Comoros (12.57 km²), from a satellite image of Sep 17, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Fomboni · AQI 25 (Good)
Fomboni's tree count comes to 124,729 trees across 8.21 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Fomboni today: AQI 25, Good
Main pollutant: PM2.5 · Observed Nov 10, 21:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Air quality is satisfactory for everyone.
PM2.5
3.9
PM10
4.9
NO₂
0.2
O₃
48.0
SO₂
0.5
CO
97.0
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put Fomboni's daily AQI at 38 on average, from 31 on Nov 7 to an hourly peak of 63 on Nov 10.
Where Fomboni stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Fomboni: Healthy tree cover
60.8% tree cover against a 30% healthy-neighborhood target, across 8.21 km² of land.
Trees in this area
124,729
Target trees
124,729
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Fomboni lost?
Since 2001, the area within 10 km of Fomboni has lost about 909 hectares of forest (about 1,300 football pitches): 6.4% of the forest it had in 2000. Most of it was lost to shifting farming, so much of it can grow back. About 362 hectares (40%) was deforestation: forest cleared for good for farms, mines or towns.
2018: satellite photo from September 2018 of a 5 × 5 km area about 7 km south of the city center.
- Forest lost since 2001
- 909 haabout 1,300 football pitches
- Share of its forest
- 6.4%of what there was in 2000
- Cleared for good
- 362 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 35 hectares a year in 2021–2025, down from 59 hectares a year in 2016–2020. The worst year was 2013, when about 150 hectares of forest were lost.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 4 ha | 5 ha | 9 ha |
| 2002 | under 1 ha | 7 ha | 7 ha |
| 2003 | 4 ha | 3 ha | 8 ha |
| 2004 | under 1 ha | 5 ha | 5 ha |
| 2005 | 6 ha | 8 ha | 14 ha |
| 2006 | under 1 ha | 2 ha | 2 ha |
| 2007 | 6 ha | 6 ha | 12 ha |
| 2008 | under 1 ha | 4 ha | 5 ha |
| 2009 | 5 ha | 5 ha | 11 ha |
| 2010 | 6 ha | 5 ha | 11 ha |
| 2011 | 1 ha | 7 ha | 8 ha |
| 2012 | 21 ha | 9 ha | 30 ha |
| 2013 | 113 ha | 37 ha | 150 ha |
| 2014 | 64 ha | 80 ha | 144 ha |
| 2015 | 16 ha | 8 ha | 25 ha |
| 2016 | 11 ha | 28 ha | 39 ha |
| 2017 | 13 ha | 46 ha | 58 ha |
| 2018 | 30 ha | 66 ha | 96 ha |
| 2019 | 9 ha | 28 ha | 37 ha |
| 2020 | 12 ha | 52 ha | 63 ha |
| 2021 | 8 ha | 15 ha | 23 ha |
| 2022 | 8 ha | 25 ha | 33 ha |
| 2023 | 6 ha | 23 ha | 28 ha |
| 2024 | 9 ha | 63 ha | 72 ha |
| 2025 | 9 ha | 12 ha | 21 ha |
What is causing deforestation around Fomboni?
- Shifting farmingcan grow back59% · 535 ha
- Farms, pasture and plantationscleared for good40% · 362 ha
Also: logging, storms, floods and other natural causes, unknown causes.
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
Forest gained and lost, 2000–2020
- Forest in 2000
- 14,100 ha
- Forest in 2020
- 14,000 ha
- Overall change
- −51 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Fomboni stayed about the same size, at about 14,000 hectares: new forest grew on about 4 hectares, and about 54 hectares were lost.
These 2000 and 2020 maps, from the University of Maryland, count any land with trees taller than 5 m as forest, including plantations and orchards. Forest that was cut or burned and had grown back by 2020 counts in both years, so the loss here is smaller than the yearly figures.
These figures cover everything within 10 km of the city center, a wider area than the report above, because forest is usually lost at a city's edges.
Source: Hansen/UMD/Google/USGS/NASA, Global Forest Change (GFC-2025-v1.13); causes: WRI/Google DeepMind drivers of forest loss; both CC BY 4.0, summed by Airleaf for each area. Forest gained and lost 2000–2020: Potapov et al. 2022, UMD GLAD Global Land Cover and Land Use Change, CC BY 4.0. Images: contains modified Copernicus Sentinel data. How it's measured
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Frequently asked
Questions about Fomboni
What is the air quality (AQI) in Fomboni right now?
The latest reading for Fomboni shows an AQI of 25 (Good), observed Nov 10, 21:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Fomboni today?
At AQI 25 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Fomboni been like this week?
Over the last 7 days, the CAMS air-quality model put Fomboni's daily AQI at 38 on average, from 31 on Nov 7 to an hourly peak of 63 on Nov 10. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Fomboni lost since 2001?
Since 2001, the area within 10 km of Fomboni has lost about 909 hectares of forest (about 1,300 football pitches): 6.4% of the forest it had in 2000. Most of it was lost to shifting farming, so much of it can grow back. About 362 hectares (40%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is slowing down: about 35 hectares a year in 2021–2025, down from 59 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Fomboni stayed about the same size, at about 14,000 hectares: new forest grew on about 4 hectares, and about 54 hectares were lost.
What is the tree count in Fomboni?
Fomboni has an estimated 124,729 trees across the 8.21 km² of land measured — 60.8% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Fomboni need?
Fomboni has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Fomboni's air quality and tree cover measured?
Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors. Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search satellite imagery at 10 m detail across a 2 km radius around Fomboni; the tree count is an estimate derived from that cover.
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