City report · Shandong, China
Yidu Air quality today
Air quality in Yidu currently reads AQI 87 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 87
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 28.3
- tree cover
- 14.7%
- trees in this area
- 46.2K
- more trees needed
- 48.1K
Measured across a 2 km radius around Qingzhou, Weifang, Shandong, China (12.57 km²), from a satellite image of Sep 22, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Yidu · AQI 87 (Moderate)
Yidu's tree count comes to 46,181 trees across 12.57 km², 15 points below the 30% tree-cover level considered healthy for this area, so roughly 48,066 more trees would close the gap.
Air quality detail
Air quality in Yidu today: AQI 87, 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 · Qingzhou Monitoring Station, Qingzhou City (青州市青州监测站), 11.6 km away · median of 3 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
28.3
PM10
41.0
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Environmental Protection Department of Shandong Province (山东省环境保护厅)
- 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 Yidu's daily AQI at 100 on average, from 56 on Nov 8 to an hourly peak of 161 on Nov 7.
Where Yidu stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Yidu: Critically low
14.7% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
46,181
Target trees
94,247
More trees needed
48,066
CO₂ if planted / yr
1,057 t
Deforestation · 2001–2025
How much forest has Yidu lost?
There was very little forest around Yidu in 2000, about 15 hectares, and about 3 hectares of it has been lost since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.
2017: satellite photo from September 2017 of a 5 × 5 km area in the city center.
The worst year was 2001, when about 1 hectare 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 | 1 ha | 1 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Yidu?
- Towns and roadscleared for good42% · 1 ha
- Farms, pasture and plantationscleared for good3.8% · under 1 ha
- Unknown causescause unknown50% · 1 ha
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
- 857 ha
- Forest in 2020
- 1,430 ha
- Overall change
- +574 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Yidu grew from about 857 hectares to 1,430 hectares, a net gain of about 574 hectares (+67%). New forest grew on about 575 hectares, while under 1 hectare was 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 Yidu
What is the air quality (AQI) in Yidu right now?
The latest reading for Yidu shows an AQI of 87 (Moderate), measured Nov 11, 23:00 local time by 3 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Qingzhou Monitoring Station, Qingzhou City (青州市青州监测站), 11.6 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Yidu today?
At AQI 87 (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 Yidu been like this week?
Over the last 7 days, the CAMS air-quality model put Yidu's daily AQI at 100 on average, from 56 on Nov 8 to an hourly peak of 161 on Nov 7. On 3 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Yidu lost since 2001?
There was very little forest around Yidu in 2000, about 15 hectares, and about 3 hectares of it has been lost since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here. Comparing satellite maps from 2000 and 2020, the forest around Yidu grew from about 857 hectares to 1,430 hectares, a net gain of about 574 hectares (+67%). New forest grew on about 575 hectares, while under 1 hectare was lost.
What is the tree count in Yidu?
Yidu has an estimated 46,181 trees across the 12.57 km² measured — 14.7% tree cover, 15 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Yidu need?
Yidu needs roughly 48,066 more trees to close a 15-point shortfall against its 30% tree-cover target — about 1,057 t of extra CO₂ absorbed per year once grown.
How are Yidu's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Qingzhou, 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 Qingzhou; the tree count is an estimate derived from that cover.
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