Bắc Giang vs Bắc Từ Liêm

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.

Bắc Từ Liêm has more tree cover — 42.6% against 28.1%.

Bắc Từ Liêm has cleaner air right now — AQI 73 against 94.

Tree cover gap: 14.5 points; Bắc Từ Liêm is ahead.
Air quality gap: 21 AQI; Bắc Từ Liêm is cleaner.
Trees between them: 46.5K; Bắc Từ Liêm has more standing.

Bắc Giang

Vietnam

Bắc Từ Liêm

Vietnam

Tree cover

Share of the 2 km radius under canopy.

28.1%

42.6%

Air quality index

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

94 · Moderate

73 · Moderate

Trees standing

Estimated from the measured canopy area.

87.3K

134K

Trees still needed

To reach the same canopy target. Fewer is better.

5.9K

CO₂ absorbed each year

By the trees already standing.

1.9M kg

2.9M kg

The full Bắc Giang report87,308 trees, measured Sentinel-2 L2A (ESA Copernicus) via Earth Search The full Bắc Từ Liêm report133,832 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. Bắc Từ Liêm is read from nearby ground stations and Bắc Giang is modelled — worth knowing, since the two are not quite like for like.

PM2.5

Fine particles, the pollutant that usually sets the index.

32.7 µg/m³

22.6 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.

Bắc GiangBắc Từ Liêm· daily US EPA index, last 7 days

Daily air quality index for Bắc Giang and Bắc Từ Liêm
Day	Bắc Giang	Bắc Từ Liêm
23 Sept	153	154
24 Sept	137	127
25 Sept	138	139
26 Sept	112	107
27 Sept	110	108
28 Sept	101	98
29 Sept	79	96

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. Bắc Từ Liêm leads here at 42.6%.

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: Bắc Giang reads 94 (moderate) and Bắc Từ Liêm reads 73 (moderate) right now.

Frequently asked

Bắc Giang and Bắc Từ Liêm, answered

Which has more trees, Bắc Giang or Bắc Từ Liêm?

Bắc Từ Liêm, with roughly 133,832 trees inside its 2 km radius against 87,308. Tree cover tells a slightly different story from raw count: Bắc Từ Liêm has the denser canopy at 42.6%.

Which has better air quality, Bắc Giang or Bắc Từ Liêm?

Bắc Từ Liêm right now, at AQI 73 against 94 — a gap of 21 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?

Bắc Giang needs about 5,903 more to reach its canopy target, and Bắc Từ Liêm about 0. 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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