Hengyang
Measured across a 2 km radius around Yanfeng District, Hengyang, Hunan, China (12.57 km²)
- Tree cover
- 23.3%
- Air quality
- 101Unhealthy for sensitive groups
- Trees in this area
- 63.0K
- More trees needed
- 31.6K
- Area analyzed
- 10.82 km²land, in a 12.57 km² circle
- Satellite image
- Sep 13, 2026
Hengyang's tree count comes to 63,024 trees across 10.82 km² of land — 12 points below the 35% tree-cover level considered healthy for this area, meaning roughly 31,647 more trees would close the gap. Air quality currently reads AQI 101 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
Tree cover detail
Below target
23.3% tree cover against a 35% healthy-neighborhood target, across 10.82 km² of land.
Trees in this area
63,024
Target trees
94,671
More trees needed
31,647
CO₂ if planted / yr
696.2 t
Air quality detail
AQI 101Unhealthy for sensitive groups
Observed Sep 27, 12:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
14.8
PM10
18.9
NO₂
0.7
O₃
138.0
SO₂
2.7
CO
212.0
Frequently asked
Questions about Hengyang
What is the tree count in Hengyang?
Hengyang has an estimated 63,024 trees across the 10.82 km² of land measured — 23.3% tree cover, 12 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Hengyang need?
Hengyang needs roughly 31,647 more trees to close a 12-point shortfall against its 35% tree-cover target — about 696.2 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Hengyang right now?
The latest reading for Hengyang shows an AQI of 101 (Unhealthy for sensitive groups), observed Sep 27, 12:00 local time via Open-Meteo / CAMS, US EPA index. Sensitive groups should limit long or intense outdoor activity.
How is Hengyang's tree cover and air quality measured?
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 Yanfeng District; the tree count is an estimate derived from that cover. Air-quality readings come from Open-Meteo / CAMS, US EPA index and may differ from street-level monitors.
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