The main problem with this approach is that the
Global Footprint Network tries to account for all of
humanity’s multifaceted demands on the planet by
reducing them down to one comparable unit: land
area. This can miss some important side effects and
whole activities. For example, energy produced by
nuclear power is converted to global hectares by
calculating how much biologically productive land
would be required to absorb the carbon dioxide
released if fossil fuels were burnt to generate an equal
amount of energy.
I do believe that I am the originator of that criticism……
Sadly I am probably mistaken in that belief, just cannot remember where I first saw it and have thus internalised the idea that it is original to me…..