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.
Both the ecological footprint and bio-capacity are expressed in global hectares globally comparable, standardized hectares with world average productivity.
On the demand side, the ecological footprint measures the ecological assets that a given population requires to produce the natural resources it consumes.
On the supply side, a city, state or nation's bio-capacity represents the productivity of its ecological assets.
Ecological footprint accounting measures the demand on and supply of nature
