Green spaces located in the path of the polluted air flow divide the initial concentrated flow into different directions. Thus, harmful emissions are diluted with clean air, and their concentration in the air decreases. It should be noted that the gas-protective role of green spaces is largely determined by the degree of their gas resistance. Plants with increased photosynthesis intensity have less resistance to gases. The peculiarity of green spaces is also that they absorb carbon dioxide from the air and release oxygen as a result of photosynthesis.