About us
About Airleaf Live air quality and forest data for anywhere on Earth
Airleaf shows live air quality (AQI) for any address on Earth, the forest each country has lost since 2001, and the trees around you.
Every number comes from a named, open source and a written-down method, and we say plainly which ones are estimates. Checking any place is free.
Air quality (AQI) now
- cities with a report
- 5,421
- countries
- 242
- years of forest records
- 2001–2025
- satellite detail for trees
- 10 m
About Airleaf
Our mission
Make the gap visible, then close it
Most cities have lost far more trees than their residents realize, and the cost to the air they breathe is easy to feel but hard to see. Airleaf reads real satellite images and air-quality data for the exact circle someone draws on a map, and shows the honest number: how many trees are there now, and how many more would bring it up to a healthy level.
Every figure is traceable to a named data source and a documented formula, and we say plainly which ones are estimates. We built it that way on purpose — the credibility of the number is what makes people and organizations willing to back the trees behind it.
Where donations go
Donations pay for native saplings, planting and a year of aftercare, and help keep Airleaf free for everyone to use.
Donate to plant trees →How it works
From a pin on the map to a tree in the ground
- 1
Drop a pin anywhere
Search an address or tap the map. We draw a circle around that exact point — no city-wide averages.
- 2
See the real numbers
Sentinel-2 satellite images show how much tree cover that circle has; nearby ground monitoring stations, or the CAMS air-quality model where there are none, give today's AQI, and CAMS a 7-day trend.
- 3
See what's missing
We compare your tree cover with a healthy-neighborhood benchmark and show, in plain numbers, how many more trees would close the gap.
- 4
Help us plant
Donations fund native saplings, planted by our team where they're needed most and cared for through their first year.
Ready to try it? Check your street →
Where the data comes from
Built on open, named sources
Sentinel-2 · ESA Copernicus
10 m satellite images, read for the exact circle you select
ESA WorldCover 2021 (CC BY 4.0)
Which of the green pixels are trees rather than crops, lawns or shrubs. © ESA WorldCover project 2021 / Contains modified Copernicus Sentinel data (2021) processed by ESA WorldCover consortium
Meta & WRI Canopy Height Maps v2 (CC BY 4.0)
Trees 3 m and taller at 1 m detail, from high-resolution satellite imagery: the street and garden trees a 10 m pixel can't resolve. © Meta Platforms and World Resources Institute, 2026
Government monitoring networks
Station readings received through OpenAQ from, among others, India's Central Pollution Control Board (Government Open Data License – India), Taiwan's Ministry of Environment (Open Government Data License 1.0), Hong Kong's Environmental Protection Department (DATA.GOV.HK), Korea Environment Corporation (AirKorea), Thailand's Pollution Control Department (Air4Thai), South Africa's SAAQIS, Rio de Janeiro's MonitorAr, the Netherlands' RIVM and Hungary's HungaroMet. Each report credits the networks its reading comes from. Readings from Queensland Government, Cyprus Department of Labour Inspection and Smart Sense stations are CC BY-SA 4.0, as are the figures derived from them
World Air Quality Index Project
Ground-station readings for cities OpenAQ doesn't cover, such as in mainland China, from the official networks the project republishes. Each report credits the project and the originating agency
Air quality from ground monitoring stations, where there are any nearby. Station data belongs to its original providers, credited on each report
Open-Meteo · CAMS
Air quality everywhere else, and the 7-day trend, from the model meteorologists use
World Bank · FAO
National forest-cover context for the country you're in
Google Maps Platform
The map, search and place names
GeoNames (CC BY 4.0)
The countries and cities our report directory covers
Hansen/UMD/Google/USGS/NASA (CC BY 4.0)
Global Forest Change: the tree cover lost each year since 2001, on the deforestation pages
WRI · Google DeepMind (CC BY 4.0)
The drivers of forest loss map, which separates deforestation from fire and logging
Global Land Cover and Land Use Change 2000–2020: the forest each city gained and lost between those years
Natural Earth (public domain)
Country, region and state boundaries for the deforestation figures
Our planting standards
A tree isn't “planted” until it survives
Plenty of tree-planting programs count a sapling the moment it's put in the ground. We count survival instead, which is why every tree we plant gets the same four things:
Native species only
Every sapling is matched to local soil and climate, chosen with input from regional forestry guidance — not a generic catalog.
Site survey before planting
Our team checks soil, sunlight and space before a single tree goes in the ground, so it actually survives.
Twelve months of aftercare
Watering, staking and health checks come with every tree we plant, not as an optional extra.
Photographed, not just counted
Planting days and follow-up visits are photographed, so every tree is accounted for.
Frequently asked
Common questions
How is Airleaf funded?+
By donations. Checking the trees and air quality of any area is free; the donations we receive pay for planting more trees and for keeping Airleaf running.
How do you count the trees in an area?+
We read Sentinel-2 satellite images from the European Space Agency at 10 m detail for the exact circle you pick, and calculate how much of it is covered by greenery using a documented vegetation formula (NDVI). A green pixel counts as tree canopy where the European Space Agency's WorldCover map shows trees, or where Meta and WRI's 1 m canopy-height map does (street and garden trees too small for a 10 m pixel), or where it stays green all year and looks like the area's trees rather than irrigated grass (newer orchards and plantations). Lawns and crop fields aren't counted as trees. The tree count is an estimate built from that cover, and anyone with the same imagery can reproduce the figure.
Where does the air quality data come from?+
Where ground monitoring stations have reported recently within about 10 km (or up to 25 km where there are none closer), today's AQI comes from them via OpenAQ, an open archive of government and community air-quality monitors, and the report credits their providers. Everywhere else it comes from Open-Meteo's CAMS air-quality model — the same forecasting system meteorologists use — corrected, where there are any within 250 km, by how far the model is off at the nearest cities that do have stations. The 7-day trend always comes from CAMS, so trends compare like for like.
How do I know the trees actually get planted?+
Our team surveys each site, plants and stakes every sapling, and photographs it on planting day and at follow-up visits through its first year.
Can my company or school sponsor a planting?+
Yes — companies, schools and organizations sponsoring a planting is one of the most common reasons people write to us. Get in touch through the contact page and we'll put together a plan.
Which countries and cities do you cover?+
You can check the trees and air quality of any place in the world. Planting is currently focused on our launch cities, and grows as donations allow.
Get involved
Donate, partner with us, or just say hello
Donations, company and school sponsorships, press, or feedback on the platform — reach our team directly.