Analysis of information sources in references of the Wikipedia article "Population geography" in English language version.
When is an area overpopulated? When its population can not be maintained without rapidly depleting non-renewable resources [39] (or converting renewable resources into non-renewable ones) and without decreasing the capacity of the environment to support the population. In short, if the long-term carrying capacity of an area is clearly being degraded by its current human occupants, that area is overpopulated.
