The full form of GHA can refer to "global hectare," a unit of measurement.
As defined in the provided reference, a global hectare (gha) is a measurement unit used to quantify the ecological footprint of individuals, populations, or activities, as well as to assess the biocapacity of the Earth or specific regions. It represents the amount of biologically productive land or sea area needed to produce the resources a person or population consumes and to absorb the corresponding waste, given prevailing technology and resource management practices.
