WHAT THE EVIDENCE SAYS
The study used i-Tree Canopy to estimate land cover and tree-related ecosystem services across Bangladesh’s city corporations. Modeled services varied sharply among cities, with Barishal ranking strongly while Dhaka South, Gazipur and Narayanganj showed larger deficits and spatial inequities. The authors also identify a gap between environmental policy frameworks and implementation.
WHY IT MATTERS / OUR READ
The useful planning signal is distribution, not a national average. Urban canopy functions as infrastructure only when trees are actually located where heat, runoff, air quality and access needs occur—and modeled service estimates should guide field verification rather than substitute for it.
CAVEATS / UNCERTAINTY
The ecosystem-service values are model-based estimates rather than direct flux measurements, and monetary values inherit i-Tree assumptions. Cross-city comparisons can identify priorities but do not by themselves establish causal benefits or local maintenance performance.
SOURCE
Discover Sustainability — primary urban-canopy modeling study
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