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A car loaded to its weight or space-carrying capacity

– The rate at which external air replaces indoor air in a given space.

a number of individuals of a population on a proper unit of space (volume or area).

a space which is sufficient for realization of the balance in the appropriate process.

source of impact the position of which in space is not vary in a considered period of its activity.

a total flow of ionizing radiation from space and because of the natural radioelements (radionuclides) -