Urban vegetation affects the environment in several ways. It improves air
quality, the height of drainage water, and soil properties, balances
temperature variations (temperatures are lower in summer and higher in
winter in the presence of urban vegetation), reduces UV radiation, reduces
noise, increases relative air humidity and contributes to certain types of
social development (ecological, aesthetic, economic aspects of urban
development). Urban vegetation especially improves microclimatic conditions
in large cities and considerably contributes to the urban increase of
oxygen. It is of vital interest to pay attention to its size and quantity in
urban areas. To assess CO2 absorption and O2 release, the photosynthesis of
five tree species and three types of herbaceous plants species was measured.
The obtained results show that there is a certain variability in terms of
the species that was analyzed. Thus, fast-growing woody deciduous species
are more suitable due to the greater and faster growth of biomass, which
requires a larger amount of CO2 compared to herbaceous species. The careful
calculation indicates the requirement of two to four trees per person or
30-40 m2 of a grassy area per person to balance the inhabitant oxygen
consumption. For the overall contribution of green vegetation, the multiple
qualitative benefits of green areas in urban areas should certainly be
considered.