Japan · Saga · 2 cities
Air quality in Saga today The AQI right now, city by city
Air quality and tree cover for 2 cities in Saga, Japan, measured from satellite imagery and live air-quality data.
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
- 19.2%
- Japan: 16.4%
Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf, refreshed hourly.
Saga
Air quality today across Saga, city by city
| Saga | 29Good | 4.5% | 79.9K | #178 of 207 |
|---|---|---|---|---|
| Karatsu | 17Good | 33.9% | — | #23 of 207 |
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 Japan.
Deforestation · 2001–2025
How much forest has Saga lost?
Since 2001, Saga has lost about 4,540 hectares of forest (about 6,400 football pitches): 3.4% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 1,330 hectares (29%) was deforestation: forest cleared for good for farms, mines or towns.
- Forest lost since 2001
- 4,540 haabout 6,400 football pitches
- Share of its forest
- 3.4%of what there was in 2000
- Cleared for good
- 1,330 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 | 68 ha | 116 ha | 184 ha |
| 2002 | 38 ha | 49 ha | 87 ha |
| 2003 | 42 ha | 68 ha | 110 ha |
| 2004 | 85 ha | 117 ha | 202 ha |
| 2005 | 74 ha | 157 ha | 231 ha |
| 2006 | 63 ha | 132 ha | 195 ha |
| 2007 | 93 ha | 231 ha | 324 ha |
| 2008 | 52 ha | 107 ha | 159 ha |
| 2009 | 46 ha | 78 ha | 124 ha |
| 2010 | 52 ha | 109 ha | 161 ha |
| 2011 | 86 ha | 104 ha | 190 ha |
| 2012 | 56 ha | 133 ha | 189 ha |
| 2013 | 30 ha | 72 ha | 102 ha |
| 2014 | 33 ha | 80 ha | 113 ha |
| 2015 | 34 ha | 111 ha | 145 ha |
| 2016 | 97 ha | 149 ha | 246 ha |
| 2017 | 52 ha | 124 ha | 176 ha |
| 2018 | 53 ha | 109 ha | 162 ha |
| 2019 | 50 ha | 118 ha | 168 ha |
| 2020 | 38 ha | 110 ha | 148 ha |
| 2021 | 48 ha | 154 ha | 201 ha |
| 2022 | 38 ha | 204 ha | 242 ha |
| 2023 | 34 ha | 181 ha | 215 ha |
| 2024 | 36 ha | 195 ha | 231 ha |
| 2025 | 35 ha | 195 ha | 230 ha |
Forest loss has stayed about the same: about 224 hectares a year in 2021–2025, against 180 hectares a year in 2016–2020. The worst year was 2007, when about 324 hectares of forest were lost.
What is causing deforestation in Saga?
- Loggingcan grow back67% · 3,030 ha
- Towns and roadscleared for good22% · 1,020 ha
- Mining and energycleared for good5.4% · 245 ha
Also: farms, pasture and plantations, 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.
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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