Vegetation is vital for the sustainability of cities, considering the fact that there are numerous sources of pollution in the urban environment, being also able to store CO₂, thus the phenomenon of CO₂ absorption by plants, during photosynthesis, is the main way through which carbon is stored in the biosphere. Fruit species, by their size, can make significant contributions in combating the effects of climate change, and by their utilitarian function, they can satisfy primary food needs. Big cities encourage and develop fruit picking initiatives in the urban environment. Referring to the carbon dioxide absorption capacity that fruit species can have in public and private green spaces in the urban environment, we observe species such as walnut, mulberry and fig, with a high storage power. Green infrastructures in the urban environment have a crucial role in mitigating climate change, the study forming a vision of the ecological potential offered by fruit trees, generating variability through the different age classes. The amount of CO₂ stored by fruit trees increases from one year to the next as the aerial part also develops, in direct correlation with the leaf surface, generating in the study the growth percentage of CO₂ absorption over a period of 50 years.