France · Brittany · 2 cities
Air quality in Brittany today The AQI right now, city by city
Right now, Brest has the cleanest air of the 2 cities we track in Brittany (AQI 17, Good), and Rennes the worst (AQI 39, Good). Rennes has the most tree cover, at 27.8% — #16 of 39 cities measured in France.
Every city is measured the same way, over the same 2 km around its center: the air quality right now, from ground stations where there are any, and its tree cover.
- cities tracked
- 2
- average tree cover
- 24.4%
- France: 25.5%
- worst air now: Rennes
- 39
- cleanest air now: Brest
- 17
Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf, refreshed hourly.
Brittany
Air quality today across Brittany, city by city
| Rennes | 39Good | 27.8% | 6.9K | #16 of 39 |
|---|---|---|---|---|
| Brest | 17Good | 21.1% | 22.0K | #28 of 39 |
Air quality is the US AQI from ground monitoring stations via OpenAQ where available, otherwise the Open-Meteo / CAMS model, refreshed hourly. Tree cover is measured within 2 km of each city center from Sentinel-2 imagery; the rank compares every city measured in France.
Deforestation · 2001–2025
How much forest has Brittany lost?
Since 2001, Brittany has lost about 1,990 hectares of forest (about 2,800 football pitches): 3.8% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 123 hectares (6.2%) was deforestation: forest cleared for good for farms, mines or towns.
- Forest lost since 2001
- 1,990 haabout 2,800 football pitches
- Share of its forest
- 3.8%of what there was in 2000
- Cleared for good
- 123 hadeforestation: turned into farms, mines or towns
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 2 ha | 11 ha | 13 ha |
| 2002 | 3 ha | 23 ha | 26 ha |
| 2003 | 5 ha | 8 ha | 13 ha |
| 2004 | 4 ha | 46 ha | 50 ha |
| 2005 | 17 ha | 60 ha | 77 ha |
| 2006 | 5 ha | 24 ha | 28 ha |
| 2007 | 10 ha | 45 ha | 55 ha |
| 2008 | 10 ha | 32 ha | 41 ha |
| 2009 | 8 ha | 42 ha | 49 ha |
| 2010 | 11 ha | 71 ha | 82 ha |
| 2011 | 8 ha | 80 ha | 87 ha |
| 2012 | 6 ha | 133 ha | 139 ha |
| 2013 | 1 ha | 17 ha | 18 ha |
| 2014 | 2 ha | 44 ha | 46 ha |
| 2015 | 3 ha | 19 ha | 22 ha |
| 2016 | 1 ha | 77 ha | 78 ha |
| 2017 | under 1 ha | 123 ha | 123 ha |
| 2018 | 6 ha | 106 ha | 112 ha |
| 2019 | 6 ha | 162 ha | 168 ha |
| 2020 | 2 ha | 61 ha | 63 ha |
| 2021 | 6 ha | 178 ha | 184 ha |
| 2022 | 7 ha | 61 ha | 68 ha |
| 2023 | under 1 ha | 235 ha | 236 ha |
| 2024 | under 1 ha | 159 ha | 160 ha |
| 2025 | under 1 ha | 52 ha | 53 ha |
Forest loss is speeding up: about 140 hectares a year in 2021–2025, up from 109 hectares a year in 2016–2020. The worst year was 2023, when about 236 hectares of forest were lost.
What is causing deforestation in Brittany?
- Loggingcan grow back83% · 1,650 ha
- Farms, pasture and plantationscleared for good3.1% · 62 ha
- Mining and energycleared for good2.2% · 44 ha
Also: towns and roads, unknown causes.
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
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. How it's measured
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