Although it is widely held that infections and eating difficulties are hallmarks of advanced dementia,25 there are few prospective data on the incidence of these complications. Over the course of 18 months, more than half of the residents in our study had infectious episodes, and 86% had eating problems.
So 10 billion people is the uppermost population limit where food is concerned. Because it's extremely unlikely that everyone will agree to stop eating meat, Wilson thinks the maximum carrying capacity of the Earth based on food resources will most likely fall short of 10 billion.
Calculating Carrying Capacity. March 10, 2015. Carrying capacity is the number of grazing animals a piece of land can support long term without causing harm to rangeland resources (vegetation, soils, and water). The characteristics of the land, vegetation, and soil determine the carrying capacity, not the land manager.