This article, using the example of the production of methane oxidative ammonolysis, discusses the problems of safe process control. This is achieved by a set of precautionary measures. The industrial safety plan prevents one of the causes of technological equipment depressurization. The production of hydrocyanic acid by oxidative ammonolysis of methane is considered, in which, to prevent the vapor-gas mixture formation, it is necessary to ensure complete sealing of the apparatus in which the combustible substance is stored, and also to maintain the pressure in the apparatus equal to the design pressure. A number of technical solutions, with the help of which it is possible to ensure the operation of devices with ammonia without the formation of explosive concentrations in them, are presented. These include: the presence of a mixture of combustible gas with an oxidizing agent with a working concentration in the apparatus above the upper or lower ignition limits, taking into account the safety margin; a system for supplying a non-combustible gas having a phlegmatizing property to the reaction zone; automatic regulators of the oxidizing agent and reducing agent ratio, as well as gas pressure regulators; protection against atmospheric and static electricity; automatic shutdown of the pipeline as a result of automatic shutoff of the valve; stationary gas analyzers that automatically signal a deviation from the norm.

Today the most important task in the development of modern Russian cities is the environment formation and maintenance that is favorable and comfortable for the population. The authors of the article revealed the main state problems of public and courtyard territories in Russian cities. Programs analysis of the urban areas improvement for the period from 2018 to 2022, aimed at the development of the urban environment provides an example of its successful implementation as applied to the city of Rostov-on-Don.

The article reveals the problem of green areas of the urban environment, which is becoming one of the most topical in Russian cities. The creation of comfortable housing is inextricably linked to the urban situation, the degree of urbanization of the living environment. With the increase in the size of cities, changes in the environmental situation the nature of the connection "housing – environment" is modifying. Activities for the improvement of areas, the organization of environmentally comfortable areas around the houses (the creation of parks, playgrounds in the yard, etc.) and the provision of standards of gardening in the absence of conditions for the usual long-term gardening can be carried out using mobile landscaping. The use of green recreational space in the city improvement allows solving the problem of green areas shortage, and will have a positive impact on the appearance of the city.

The authors of the article consider the sustainable development of the housing stock of a large city from the standpoint of four factors: increasing the energy efficiency of buildings under construction and renovation; overhaul of apartment buildings, taking into account the requirements for their energy efficiency; the choice between construction and reconstruction according to the resource costs criterion; management of the housing stock resource supply based on the requirements for comfortable living of owners and improving the quality of services provided in the field of housing and utilities infrastructure (hereinafter HUI). According to the authors, it is necessary to use energy-saving modern building materials, products and structures and to assess the life cycle of buildings when choosing organizational and technical solutions for the demolition or reconstruction of buildings for the sustainable development of the housing stock.