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Ecological footprint
b) On the demand side, the Ecological Footprint measures the ecological assets that a given population requires to produce the natural resources and services it consumes.
a) On the supply side, a city, region, or nation’s biocapacity represents the productivity of its ecological assets.
d) Ecological footprint accounting measures the demand on the supply of nature.
e) It tracks the use of six categories of productive surface areas: cropland, grazing land, fishing grounds, built-up land, forest area, and carbon demand on land.
c) Both measures are expressed in global hectares — globally comparable, standardized hectares with world average productivity.