Huella ecológica - the area of land and water it takes for a human population to generate the renewable resources it consumes and to absorb the corresponding waste it generates, using prevailing technology. In other words, it measures the "quantity of nature" that we use and compares it with how much "nature" we have.
Biocapacidad - serves as a lens, showing the capacity of biosphere to regenerate and provide for life. It allows researchers to add up the competing human demands, which include natural resources, waste absorption, water renewal, and productive areas dedicated to urban uses. As an aggregate, biocapacity allows us to determine how large the material metabolism of human economies is compared to what nature can renew.
Hectárea mundial (gha) - a biologically productive hectare with world average productivity. Because each unit of space harbours a different portion of the global regenerative capacity, each unit is counted proportional to its global biocapacity share. For this reason, hectares are adjusted proportionally to their productivity and are expressed in global hectares.
Fuente de datos: 2016 Global Footprint Network. National Footprint Accounts, 2016 Edition.