A collection of eight selected reports on air pollution investigations conducted in USSR, are presented. The reports deal with the following: An extensive survey of the principal advances in research on the gas resistance of plants and of the causes of plant vulnerability to gas; and a number of investigations conducted in laboratories and on field plots of the Botanical Garden of Perm University in reference to the feasibility of regulating the gas resistance of plants by means of certain nutritional elements, in reference to a number of biochemical and physiological indicators that can be used to solve the problem of diagnostics of the gas resistance of plants and to characterize species differences in their gas resistance, and to determine the minimum-permissible norms of certain air pollutants for individual species of plants.