d) Ecological footprint accounting measures the demand on the supply of nature.
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.
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.
a) On the supply side, a city, region, or nation’s biocapacity represents the productivity of its ecological assets.
c) Both measures are expressed in global hectares — globally comparable, standardized hectares with world average productivity.
