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Airleaf

Aix-en-Provence vs Piacenza

Tree cover and air quality for both, measured the same way: Sentinel-2 imagery at 10 m detail over a 2 km radius from each city centre, and the live US EPA air quality index. Same radius and same index, so the two numbers compare directly.

Aix-en-Provence has more tree cover — 42.2% against 28.8%.

Aix-en-Provence has cleaner air right now — AQI 24 against 51.

Tree cover gap
13.4 points
Aix-en-Provence is ahead.
Air quality gap
27 AQI
Aix-en-Provence is cleaner.
Trees between them
46.2K
Aix-en-Provence has more standing.
Aix-en-Provence

France

Piacenza

Italy

Tree cover

Share of the 2 km radius under canopy.

42.2%

28.8%

Air quality index

US EPA index, live, with its band. Lower is better.

24 · Good

51 · Moderate

Trees standing

Estimated from the measured canopy area.

133K

86.4K

Trees still needed

To reach the same canopy target. Fewer is better.

0

3.6K

CO₂ absorbed each year

By the trees already standing.

2.9M kg

1.9M kg

The full Aix-en-Provence report132,575 trees, measured Sentinel-2 L2A (ESA Copernicus) via Earth SearchThe full Piacenza report86,406 trees, measured Sentinel-2 L2A (ESA Copernicus) via Earth Search

Air quality in detail

What each city is breathing

Concentrations in µg/m³, measured at the same moment as the index above. Lower is better in every row. Aix-en-Provence is read from nearby ground stations and Piacenza is modelled — worth knowing, since the two are not quite like for like.

PM2.5

Fine particles, the pollutant that usually sets the index.

5.7 µg/m³

12.2 µg/m³

The last week, day by day

A single reading can catch a city on a bad afternoon. The week says whether it was the weather or the place.

Reading these numbers

What is actually being measured

Tree cover

The share of ground under canopy inside a 2 km radius of each city centre, read from Sentinel-2 satellite imagery at 10 m detail. It is a measurement of that circle, not of the whole municipality — which is exactly what makes the two comparable, since city boundaries are drawn to wildly different rules around the world. Aix-en-Provence leads here at 42.2%.

Air quality index

The live US EPA index, computed from current pollutant concentrations — ground stations where a city has them nearby, and a model everywhere else. It moves hour to hour, so this is a snapshot rather than a verdict on either place: Aix-en-Provence reads 24 (good) and Piacenza reads 51 (moderate) right now.

Frequently asked

Aix-en-Provence and Piacenza, answered

Which has more trees, Aix-en-Provence or Piacenza?

Aix-en-Provence, with roughly 132,575 trees inside its 2 km radius against 86,406. Tree cover tells a slightly different story from raw count: Aix-en-Provence has the denser canopy at 42.2%.

Which has better air quality, Aix-en-Provence or Piacenza?

Aix-en-Provence right now, at AQI 24 against 51 — a gap of 27 points. This is a live reading rather than an annual average, so it can reverse within a day.

How many more trees does each city need?

Aix-en-Provence needs about 0 more to reach its canopy target, and Piacenza about 3,600. The target is the same share of ground for both, so the figures are directly comparable.

Are these two measured the same way?

Yes — that is the point of the page. Identical radius, identical satellite source at 10 m detail, and the same US EPA index for air. Nothing here is adjusted for population, city limits or climate, so the numbers describe the same-sized circle of ground in each place.

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