The Samgau Project is fully consistent with the One Trillion Trees Global Initiative, announced at the World Economic Forum in Davos at the end of January 2020 and supported by leaders from all over the world. The Initiative is about planting of about 1 trillion trees worldwide until 2030, which by the expert‘s analyses will have a significant impact on reducing CO2 in the planet‘s atmosphere. However, our analysis allows us to argue that the correct selection of plant species and their planting sites, in addition to the general task of neutralizing carbon dioxide emissions, will solve the more serious problem faced by many large cities, namely the catastrophic level of accumulation of smog and pollutants. Unfortunately, historically due to the necessity of those times, the most cities are located in the foothills, in natural narrows, which impedes the process of convection of surface polluted air, which is a natural mechanism of air purification. Physically, the surface heating efficiency, and therefore the convection intensity, depends on two main parameters: the angle of incidence of solar radiation and the absorption efficiency of the surface (Albedo coefficient). The main territory of the formation of vertical convection process in cities is the territory that absorbs more light – dark roofs, roads, agricultural lands of the suburbs, a water mirror of the river, lakes, etc., which intensively absorb the sun during the summer period, warm themselves and the lower layers of the atmosphere that creates a powerful heat flow that can ―break through‖ the blocking layer of smog and ventilate the city. In winter, the intensity of the low-level sun is much lower, the roofs and roads of the city are covered with snow, the sun‘s rays are almost specularly reflected from the surrounding forests, slopes, etc., and the convection mechanism stops working. An elegant, environmentally friendly and at the same time simple and obvious solution that does not require complicated technical decisions and financial investments is to increase the absorption capacity of urban slopes in the vicinity by planting a forest of evergreen trees. Based on the studies, it was concluded that the most suitable type of trees for these purposes, depending on the climatic and geographical features of the region, are conifers, namely various species of pines, spruce, etc., especially the unique Tian-Shan spruce which can easily raise in extreme environments and remain completely black in cross the cross section for the winter sun, which is low above the horizon, even in the snowiest winter, this is due to the fact that the spruce, with its millions of needles, absorbs almost all radiation, that is, it is absolutely the best absorber of light or a direct source of heating of ambient air. A large spruce has a cross-sectional area of about 100 m2, given that the density of the sun‘s flux is about one kW / m2, one spruce can generate a flow of 10-100 kW. Having an effective park / forest area of 10-100 km2, we get the power of the ―heat source‖ up to 100 GW. And if, based on the geographical location of the city, the wind rose, to plant a large forest in the right place (ideally on the southern and / or eastern, western slope of the narrows), it is possible to create a heat source with a capacity of about 100 GW, which will form a powerful upward air flow, destroying and preventing the ill-fated cloud of smog from forming!