City report · Democratic Republic of the Congo
Gemena Air quality today
Air quality in Gemena currently reads AQI 64 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 64
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 14.1
- tree cover
- 57.9%
- trees in this area
- 182K
- more trees needed
- 0
Measured across a 2 km radius around Gemena, Democratic Republic of the Congo (12.57 km²), from a satellite image of Sep 15, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Gemena · AQI 64 (Moderate)
Gemena's tree count comes to 181,898 trees across 12.57 km², already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Gemena today: AQI 64, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 18:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
14.1
PM10
18.5
NO₂
1.9
O₃
37.0
SO₂
0.4
CO
253.0
- Outdoor exercise
- Fine for most people; unusually sensitive people should take long or hard exercise easier
- Windows
- Fine to open; close them if you are sensitive to pollution
- Mask
- Not needed for most people
- Air purifier
- Worth running if you are sensitive
Over the last 7 days, the CAMS air-quality model put Gemena's daily AQI at 53 on average, from 39 on Nov 6 to an hourly peak of 68 on Nov 10.
Where Gemena stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Gemena: Healthy tree cover
57.9% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
181,898
Target trees
181,898
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Gemena lost?
Since 2001, the area within 10 km of Gemena has lost about 4,270 hectares of forest (about 6,000 football pitches): 15% of the forest it had in 2000. Most of it (95%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from January 2017 of a 5 × 5 km area about 7 km southwest of the city center.
- Forest lost since 2001
- 4,270 haabout 6,000 football pitches
- Share of its forest
- 15%of what there was in 2000
- Cleared for good
- 4,030 hadeforestation: turned into farms, mines or towns
Forest loss has stayed about the same: about 156 hectares a year in 2021–2025, against 169 hectares a year in 2016–2020. The worst year was 2014, when about 519 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 | 10 ha | under 1 ha | 10 ha |
| 2002 | 42 ha | 3 ha | 45 ha |
| 2003 | 127 ha | 4 ha | 131 ha |
| 2004 | 23 ha | under 1 ha | 24 ha |
| 2005 | 73 ha | 2 ha | 75 ha |
| 2006 | 33 ha | under 1 ha | 33 ha |
| 2007 | 470 ha | 15 ha | 485 ha |
| 2008 | 68 ha | 1 ha | 69 ha |
| 2009 | 116 ha | 3 ha | 119 ha |
| 2010 | 243 ha | 7 ha | 250 ha |
| 2011 | 304 ha | 7 ha | 311 ha |
| 2012 | 210 ha | 5 ha | 215 ha |
| 2013 | 231 ha | 13 ha | 244 ha |
| 2014 | 501 ha | 18 ha | 519 ha |
| 2015 | 99 ha | 13 ha | 111 ha |
| 2016 | 181 ha | 17 ha | 198 ha |
| 2017 | 230 ha | 17 ha | 247 ha |
| 2018 | 152 ha | 10 ha | 162 ha |
| 2019 | 89 ha | 10 ha | 99 ha |
| 2020 | 127 ha | 13 ha | 140 ha |
| 2021 | 143 ha | 7 ha | 150 ha |
| 2022 | 75 ha | 4 ha | 79 ha |
| 2023 | 144 ha | 14 ha | 158 ha |
| 2024 | 180 ha | 26 ha | 206 ha |
| 2025 | 161 ha | 26 ha | 187 ha |
What is causing deforestation around Gemena?
- Farms, pasture and plantationscleared for good82% · 3,520 ha
- Towns and roadscleared for good12% · 514 ha
- Shifting farmingcan grow back5.5% · 235 ha
Also: 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
- 10,700 ha
- Forest in 2020
- 6,720 ha
- Overall change
- −3,970 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Gemena shrank from about 10,700 hectares to 6,720 hectares, a net loss of about 3,970 hectares (−37%). New forest grew on about 214 hectares, but 4,190 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
In the same region
Measured cities near Gemena
Same 2 km radius, same index — so they compare directly.
- Bangui182.6 km
Central African Republic
- Tree cover
- 26%
- Air quality
- 65
- Bimbo187.1 km
Central African Republic
- Tree cover
- 61%
- Air quality
- 84
- Bégoua191.3 km
Central African Republic
- Tree cover
- 42%
- Air quality
- 55
- Lisala229.4 km
Democratic Republic of the Congo
- Tree cover
- 67%
- Air quality
- 63
- Impfondo263.4 km
Republic of the Congo
- Tree cover
- 65%
- Air quality
- 51
- Bambari296.7 km
Central African Republic
- Tree cover
- 46%
- Air quality
- 73
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Frequently asked
Questions about Gemena
What is the air quality (AQI) in Gemena right now?
The latest reading for Gemena shows an AQI of 64 (Moderate), observed Nov 10, 18:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Gemena today?
At AQI 64 (Moderate): fine for most people; unusually sensitive people should take long or hard exercise easier. Windows: fine to open; close them if you are sensitive to pollution. Masks: not needed for most people. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Gemena been like this week?
Over the last 7 days, the CAMS air-quality model put Gemena's daily AQI at 53 on average, from 39 on Nov 6 to an hourly peak of 68 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 Gemena lost since 2001?
Since 2001, the area within 10 km of Gemena has lost about 4,270 hectares of forest (about 6,000 football pitches): 15% of the forest it had in 2000. Most of it (95%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Forest loss has stayed about the same: about 156 hectares a year in 2021–2025, against 169 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Gemena shrank from about 10,700 hectares to 6,720 hectares, a net loss of about 3,970 hectares (−37%). New forest grew on about 214 hectares, but 4,190 hectares were lost.
What is the tree count in Gemena?
Gemena has an estimated 181,898 trees across the 12.57 km² measured — 57.9% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Gemena need?
Gemena has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Gemena'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 Gemena; the tree count is an estimate derived from that cover.
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