Exponential growth also applies to the the human population. It begins growing very slowly, but over generations the growth rate increases more and more rapidly, similar to a snowball affect.Simply stated, overpopulation occurs when a Population in a given area exceeds the carrying capacity of the land. For humans, carrying capacity refers to the number who can be supported without degrading the physical, ecological, cultural, and social environments. Carrying capacity relates to the desired quality of life.