City report · Yunnan, China
Majie Air quality today
Air quality in Majie currently reads AQI 72 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 72
Moderate
- PM2.5, fine particles (µg/m³)
- 20.2
- tree cover
- 27.0%
- trees in this area
- 84.8K
- more trees needed
- 9.4K
Measured across a 2 km radius around Xishan, Kunming, Yunnan, China (12.57 km²), from a satellite image of Sep 2, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Majie · AQI 72 (Moderate)
Majie's tree count comes to 84,823 trees across 12.57 km², 3 points below the 30% tree-cover level considered healthy for this area, so roughly 9,425 more trees would close the gap.
Air quality detail
Air quality in Majie today: AQI 72, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 23:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Biji Square, Kunming (昆明碧鸡广场), 400 m away · median of 4 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
20.2
PM10
22.7
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Yunnan Environmental Protection Agency (云南省环境保护厅)
- 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 Majie's daily AQI at 44 on average, from 21 on Nov 9 to an hourly peak of 98 on Nov 5.
Where Majie stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Majie: Below target
27.0% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
84,823
Target trees
94,248
More trees needed
9,425
CO₂ if planted / yr
207.3 t
Deforestation · 2001–2025
How much forest has Majie lost?
Since 2001, the area within 10 km of Majie has lost about 326 hectares of forest (about 460 football pitches): 4.5% of the forest it had in 2000. Most of it (75%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from February 2017 of a 5 × 5 km area about 4 km northwest of the city center.
- Forest lost since 2001
- 326 haabout 460 football pitches
- Share of its forest
- 4.5%of what there was in 2000
- Cleared for good
- 246 hadeforestation: turned into farms, mines or towns
The worst year was 2020, when about 67 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 | under 1 ha | under 1 ha | 2 ha |
| 2002 | under 1 ha | under 1 ha | 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 1 ha | under 1 ha | 1 ha |
| 2005 | 4 ha | under 1 ha | 4 ha |
| 2006 | 6 ha | 1 ha | 7 ha |
| 2007 | 6 ha | under 1 ha | 6 ha |
| 2008 | 10 ha | under 1 ha | 10 ha |
| 2009 | 9 ha | 2 ha | 11 ha |
| 2010 | 23 ha | 19 ha | 42 ha |
| 2011 | 18 ha | 4 ha | 22 ha |
| 2012 | 5 ha | under 1 ha | 6 ha |
| 2013 | 5 ha | 3 ha | 8 ha |
| 2014 | 12 ha | 3 ha | 15 ha |
| 2015 | 5 ha | 2 ha | 7 ha |
| 2016 | 14 ha | 9 ha | 23 ha |
| 2017 | 3 ha | under 1 ha | 4 ha |
| 2018 | 1 ha | 2 ha | 3 ha |
| 2019 | 12 ha | 2 ha | 14 ha |
| 2020 | 58 ha | 9 ha | 67 ha |
| 2021 | 17 ha | 10 ha | 27 ha |
| 2022 | 23 ha | 4 ha | 28 ha |
| 2023 | 4 ha | 3 ha | 6 ha |
| 2024 | 4 ha | under 1 ha | 5 ha |
| 2025 | 5 ha | 3 ha | 8 ha |
What is causing deforestation around Majie?
- Towns and roadscleared for good50% · 162 ha
- Mining and energycleared for good22% · 73 ha
- Loggingcan grow back21% · 69 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.
Forest gained and lost, 2000–2020
- Forest in 2000
- 8,790 ha
- Forest in 2020
- 9,280 ha
- Overall change
- +495 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Majie grew from about 8,790 hectares to 9,280 hectares, a net gain of about 495 hectares (+5.6%). New forest grew on about 885 hectares, while 390 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 Majie
What is the air quality (AQI) in Majie right now?
The latest reading for Majie shows an AQI of 72 (Moderate), measured Nov 11, 23:00 local time by 4 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Biji Square, Kunming (昆明碧鸡广场), 400 m away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Majie today?
At AQI 72 (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 Majie been like this week?
Over the last 7 days, the CAMS air-quality model put Majie's daily AQI at 44 on average, from 21 on Nov 9 to an hourly peak of 98 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Majie lost since 2001?
Since 2001, the area within 10 km of Majie has lost about 326 hectares of forest (about 460 football pitches): 4.5% of the forest it had in 2000. Most of it (75%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Majie grew from about 8,790 hectares to 9,280 hectares, a net gain of about 495 hectares (+5.6%). New forest grew on about 885 hectares, while 390 hectares were lost.
What is the tree count in Majie?
Majie has an estimated 84,823 trees across the 12.57 km² measured — 27.0% tree cover, 3 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Majie need?
Majie needs roughly 9,425 more trees to close a 3-point shortfall against its 30% tree-cover target — about 207.3 t of extra CO₂ absorbed per year once grown.
How are Majie's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Xishan, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. 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 Xishan; the tree count is an estimate derived from that cover.
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