This collection includes papers on the methodological aspects of the long-term prediction of pollutant emissions, the use of order statistics to analyze air-pollution data, the use of systems-analysis principles for the long-term prediction of environment pollution, and climatic effects on the diffusion of harmful pollutants in the atmosphere over Erevan. Consideration is also given to standards for thermal emissions from nuclear power plants, the radioactivity balance in the cooling reservoir of a nuclear power plant, and an economic analysis of the ecological costs of industrial production.
Proskuryakov . Greber (1] formulates the problem which was previously solved • Stefan, as follows: 1 “at the initial moment in time all points of a humid soil...depth of the ground becomes non-uniform , and cannot be averaged . I. A. Charnyy  and B. V. Proskuryakov  have developed simplified analytical...to unity, according to Charnyy has the following form: (13) and according to Proskuryakov it has the form ( 14 ) 3This drawback is alleviated by
calculating the freezing rate of homogeneous water-permeable soils by a single column; the method has been developed in works of B. V. Proskuryakov  and...ground volume freezes ; I. I L is the length of the freezing column; r is the radius of the frozen ground cylinder; r is time. B. V. Proskuryakov [1