City report · Zhejiang, China
Guli Air quality today
Air quality in Guli currently reads AQI 109 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
AQI 109
Air quality right now
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 39.1
- tree cover
- 28.8%
- trees in this area
- 88.9K
- more trees needed
- 19.1K
Measured across a 2 km radius around Yongkang, Jinhua, Zhejiang, China (12.57 km²), from a satellite image of Sep 19, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Guli · AQI 109 (Unhealthy for sensitive groups)
Guli's tree count comes to 88,940 trees across 12.36 km² of land, 6 points below the 35% tree-cover level considered healthy for this area, so roughly 19,147 more trees would close the gap.
Air quality detail
Air quality in Guli today: AQI 109, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 11, 03:00 local time via Open-Meteo / CAMS, corrected with 17 ground-station cities within 250 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 17 station cities within 250 km, e.g. Jinhua and Lishui
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
39.1
PM10
50.2
NO₂
55.3
O₃
0.0
SO₂
5.7
CO
372.0
- Outdoor exercise
- Children, older adults and people with asthma or heart disease should cut down long or hard exercise
- Windows
- Close them to keep the outside air out
- Mask
- Sensitive groups: an N95 outdoors
- Air purifier
- Run one, especially in bedrooms
Over the last 7 days, the CAMS air-quality model put Guli's daily AQI at 80 on average, from 49 on Nov 9 to an hourly peak of 130 on Nov 11.
Where Guli stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Guli: Below target
28.8% tree cover against a 35% healthy-neighborhood target, across 12.36 km² of land.
Trees in this area
88,940
Target trees
108,087
More trees needed
19,147
CO₂ if planted / yr
421.2 t
Deforestation · 2001–2025
How much forest has Guli lost?
Since 2001, the area within 10 km of Guli has lost about 696 hectares of forest (about 970 football pitches): 8.7% of the forest it had in 2000. Most of it (64%) was deforestation, forest cleared for good, mainly for towns and roads.
2018: satellite photo from December 2017 of a 5 × 5 km area about 6 km southeast of the city center.
- Forest lost since 2001
- 696 haabout 970 football pitches
- Share of its forest
- 8.7%of what there was in 2000
- Cleared for good
- 442 hadeforestation: turned into farms, mines or towns
Forest loss is speeding up: about 52 hectares a year in 2021–2025, up from 35 hectares a year in 2016–2020. The worst year was 2023, when about 133 hectares of forest were lost, mostly to wildfires.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | under 1 ha | 2 ha | 3 ha |
| 2002 | 3 ha | 5 ha | 8 ha |
| 2003 | 4 ha | 5 ha | 8 ha |
| 2004 | 9 ha | 18 ha | 27 ha |
| 2005 | 4 ha | 5 ha | 9 ha |
| 2006 | 4 ha | 8 ha | 13 ha |
| 2007 | 15 ha | 12 ha | 27 ha |
| 2008 | 7 ha | 12 ha | 18 ha |
| 2009 | 12 ha | 24 ha | 37 ha |
| 2010 | 12 ha | 7 ha | 19 ha |
| 2011 | 11 ha | 2 ha | 12 ha |
| 2012 | 3 ha | 8 ha | 11 ha |
| 2013 | 6 ha | 2 ha | 8 ha |
| 2014 | 12 ha | 2 ha | 14 ha |
| 2015 | 41 ha | 10 ha | 50 ha |
| 2016 | 19 ha | 5 ha | 24 ha |
| 2017 | 49 ha | 2 ha | 51 ha |
| 2018 | 31 ha | 2 ha | 33 ha |
| 2019 | 45 ha | under 1 ha | 45 ha |
| 2020 | 23 ha | under 1 ha | 23 ha |
| 2021 | 20 ha | 1 ha | 21 ha |
| 2022 | 13 ha | 2 ha | 15 ha |
| 2023 | 49 ha | 84 ha | 133 ha |
| 2024 | 16 ha | 20 ha | 36 ha |
| 2025 | 35 ha | 18 ha | 53 ha |
What is causing deforestation around Guli?
- Towns and roadscleared for good44% · 306 ha
- Loggingcan grow back22% · 152 ha
- Mining and energycleared for good19% · 133 ha
Also: wildfires, farms, pasture and plantations, 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
- 12,200 ha
- Forest in 2020
- 11,700 ha
- Overall change
- −544 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Guli shrank from about 12,200 hectares to 11,700 hectares, a net loss of about 544 hectares (−4.4%). New forest grew on about 133 hectares, but 677 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 Guli
What is the air quality (AQI) in Guli right now?
The latest reading for Guli shows an AQI of 109 (Unhealthy for sensitive groups), observed Nov 11, 03:00 local time via Open-Meteo / CAMS, corrected with 17 ground-station cities within 250 km, US EPA index. The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Guli today?
At AQI 109 (Unhealthy for sensitive groups): children, older adults and people with asthma or heart disease should cut down long or hard exercise. Windows: close them to keep the outside air out. Masks: sensitive groups: an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Guli been like this week?
Over the last 7 days, the CAMS air-quality model put Guli's daily AQI at 80 on average, from 49 on Nov 9 to an hourly peak of 130 on Nov 11. On 2 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Guli lost since 2001?
Since 2001, the area within 10 km of Guli has lost about 696 hectares of forest (about 970 football pitches): 8.7% of the forest it had in 2000. Most of it (64%) was deforestation, forest cleared for good, mainly for towns and roads. Forest loss is speeding up: about 52 hectares a year in 2021–2025, up from 35 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Guli shrank from about 12,200 hectares to 11,700 hectares, a net loss of about 544 hectares (−4.4%). New forest grew on about 133 hectares, but 677 hectares were lost.
What is the tree count in Guli?
Guli has an estimated 88,940 trees across the 12.36 km² of land measured — 28.8% tree cover, 6 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Guli need?
Guli needs roughly 19,147 more trees to close a 6-point shortfall against its 35% tree-cover target — about 421.2 t of extra CO₂ absorbed per year once grown.
How are Guli'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 Yongkang; the tree count is an estimate derived from that cover.
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