[Hygienic assessment of combined action of ambient air pollutions in the localities].

The paper describes the experimental studies dealing with the reflectory and resorptive effects of a gas-vapor-dust-like mixture comprising sulfur dioxide, nitrogen dioxide, hydrogen fluoride, and suspension particles. The combined effect of the mixture when inhaled by animals was ascertained to present as the incomplete summation effect type. In the combined presence in the ambient air, the sum of shares of sulfur dioxide, nitrogen dioxide, hydrogen fluoride, and suspension particles should not be greater than 0.4 MPC of the isolated effect of each agent alone.