WHAT THE EVIDENCE SAYS
Researchers estimated 2021 consumption across 52 categories in all 83,603 populated US census tracts. Per-capita ecological footprint was somewhat higher in urban tracts than suburban or rural ones; aggregate urban footprint scaled approximately linearly with population across alternative city boundaries.
WHY IT MATTERS / OUR READ
Planning debates should distinguish a city's direct spatial footprint from its indirect demand for land, materials, goods and services far outside city limits.
CAVEATS / UNCERTAINTY
Footprint estimates are model-based 2021 consumption accounting, not direct ecological condition or proof that density has no transport or habitat benefits. Average differences by settlement class were small and sensitive to definitions.
SOURCE
Nature Communications — primary urban consumption footprint analysis
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