Аннотация:It is presented enumeration of estimations of aspects sustainability development taking into account pattern of risk factors (ecological, economic and technogenic). A feature and appropriateness of different approaches are shown at the estimation of development of the difficult systems with reciprocal influence of the indicated factors. It is considered that a number of people are the suitable integral indicator of ecological, economic and demographic factors of sustainability development of society.
Keyword: indicators, number of population, sustainability development.