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The excessive amounts of carbon dioxide produced in particular by mobile sources is a relevant problem for densely populated urban areas. The study represents the estimation of CO 2 masses released by the motor vehicles in one of the Russian Federation regions-Nazran city and Nazran district of Ingush Republic. The main points of research are the identification of periods of maximum and minimum amounts of daily emissions of CO 2 and the charting of daily accumulation of CO 2 emitted into the atmosphere by automobiles in the investigated area. The study includes the comparative analysis of the negative environmental impact of vehicle groups classified by the main consumer feature and the type of used fuel. The article presents the algorithm of calculating the masses of polluting substances emitted by motor transport in the city agglomeration area. The obtained results can be used for the supply air volume calculation based on the accounting for hydrocarbon fuel consumption and finally for the identifying of the ecosystem's carrying capacity.

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The article proposes an approach to justify the tool for internalizing external effects from emissions of pollutants by motor vehicles in the territory. It is based on the proposed methods to determine the environmental sustainability criterion, taking into account the characteristics of the ecosystem of the territory, estimating the masses of pollutant emissions by different vehicles in the territory and the economic damage to the ecosystem from the emission of toxicants. The direction of development of the regional tax system with its greening is presented. The features of the formation of an environmental tax on cars depending on the development objectives of the territory and the mechanisms for their implementation are considered. The consequences of the influence of proposals on various sectors of the economy as a whole and the agricultural sector in particular are determined.

Externalities are a significant feature for recreational tourism. The increase in the specificity of the resource and its significance for the territory may be an additional factor in lowering the requirements for the effective implementation of Coase’s idea to solve the problem of externalities. Tourist recreational areas can be an ideal object for implementing Coase’s idea of reducing externalities. Given the assessment of environmental quality with the consideration of assimilation potential, it is possible to describe the additional value of changing the volume of environmental pollution for the economic system in the recreational area. The increasing importance of other factors for tourist recreational activities can be factored into the proposed dependency by developing ideas of the assimilation potential of the territory. An approach is proposed for assessing the utility of environmental protection activities in a recreational tourist area which is based on the consideration of changes in the recreational capacities of natural environment and the consequences thereof for the economic system of the territory. The proposed indicator of utility with an adequate assessment of the costs of implementing a project better reflects the cost-effectiveness and results of environmental protection.