The shortfall in Earth's biological capacity to meet the demands of its human population. Wackernagel et al. (2002) Procs Nat. Acad. Sci. 99, 14 argue that human demand may well have exceeded the biosphere's regenerative capacity; in 1961 humanity's load was 70% of the capacity of the global biosphere, rising to 120% in 1999.
Subjects: Earth Sciences and Geography.