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The COVID-19 pandemic has caused large-scale institutional and behavioral "shock effects" in many fields of human activity, including education. All over the world more than 1.5 billion of students at schools and universities have been unable to attend classes from time to time [1]. Various countries and communities have been forced to look for quick decisions on digital learning platforms [2]. This gave a remarkable boost to online learning. At a time of crisis educational organizations should carefully think ove...

The active development of large cities leads to increase of wastes. And as a result, a system of interrelated problems was formed: 1) The negative impact of municipal solid waste (MSW) landfills on the population and the environment; 2) The irrational use of land adjacent to metropolises; 3) The lack of modern facilities. In Russia the MSW landfills for a long time will be used for disposal of solid wastes residues. To date, 93% of generated wastes is placed on landfills. The main objective is to reduce the number...