Optimum population and carrying capacity (MS)
The optimum population is a concept where the human population is able to balance maintaining a maximum population size (1) with optimal standards of living for all people (1). Although some link it to the best use of resources or highest level of income (1).
The carrying capacity of an environment is the maximum population size (1) of a biological species that can be sustained in that specific environment (1) given the food, habitat, water, and other resources available (1).
(maximum population size for the given supply of resources.)