With the ambition of evolving from simple producers of greenery to promoters of a healthier and more vital urban ecosystem, we commissioned PNAT (Project Nature) to develop graphic charts on the environmental benefits of over 50 species cultivated with high sustainability standards.
The results highlight the value of benefits provided by each species after seven years in our nurseries and subsequent years after planting, simulating optimal growth conditions.
Quantifying these benefits helps understand the importance of preserving and integrating our natural heritage, enhancing our product.
Green areas significantly reduce pollution, soil erosion, improve citizen well-being, and preserve biodiversity.
Sensitivity to ecosystem issues should become a concrete opportunity for serious engagement in projects that center people, promote a healthy lifestyle, and sustainable environmental balance.
How to read a chart
What is meant by CO2 sequestration and storage?
Trees absorb CO2 through photosynthesis, reducing atmospheric carbon dioxide and storing it permanently in their woody parts, including roots.
Storage refers to the accumulation of carbon in living plant biomass, while sequestration indicates the long-term removal of CO2 from the atmosphere and its storage in terrestrial reservoirs, including soil and vegetation.
The value of sequestered CO2 varies based on factors such as plant species, growth characteristics, environmental conditions, water availability, and stress factors.
Recent research confirms the role of greenery in improving environmental quality through ecosystem services, including reducing particulate matter (PM).
Particulate Matter (PM)
PM10: Particles ≤ 10 µm, with long atmospheric residence time, can be inhaled into the upper respiratory tract. Sources include natural (wind erosion, volcanic eruptions) and anthropogenic (vehicle traffic).
PM2.5: Particles ≤ 2.5 µm, can reach the bronchi.
Other Pollutants
O3 (Ozone): Secondary pollutant formed through photochemical processes, with high concentrations in warm months. Causes health and ecosystem issues.
NO2 (Nitrogen Dioxide): Reddish-brown gas, contributes to photochemical smog and acid rain, affects human health.
SO2 (Sulfur Dioxide): Colorless gas, leads to acid deposition and secondary PM formation.
Runoff Reduction
Runoff refers to the rainwater absorbed by vegetation, reducing flood risks.
Estimation Methodology
Using a model developed by Nowak et al. and the USDA Forest Service, the benefits of selected species were evaluated. Benefits were calculated for trees at ages seven and fifty, based on allometric equations and tree measurements, particularly the diameter at breast height (d.b.h).
O3 (Ozone) Tropospheric ozone is a secondary pollutant formed through photochemical processes in the presence of primary pollutants like nitrogen oxides (NOx) and volatile organic compounds (VOCs). Higher concentrations are recorded during warm months and peak sunlight hours. In urban areas, ozone forms and transforms rapidly. Major sources of its precursors include road transport, residential heating, and energy production. Ozone can cause significant health problems, affect ecosystems, agriculture, and materials.
NO2 (Nitrogen Dioxide) This reddish-brown gas, slightly soluble in water and toxic with a strong pungent odor, is widespread and negatively impacts human health. Along with nitric oxide, it contributes to photochemical smog (precursor to secondary pollutants like tropospheric ozone and fine particulate matter), eutrophication, and acid rain.
SO2 (Sulfur Dioxide) This colorless gas with a sharp, pungent smell is highly soluble in water. As a primary pollutant, it can remain in the atmosphere for days and be transported long distances. It contributes to transboundary pollution, acid deposition (both dry and wet), and secondary particulate matter formation.
Runoff Reduction Runoff is the amount of rainwater retained and absorbed by vegetation, which regulates stormwater flow and reduces flood risks.
Estimation Methodology Using a software model developed by Nowak et al. and the USDA Forest Service’s Northern Research Station, the benefits of various species were evaluated. Benefits were calculated at two time points: seven and fifty years of age, using allometric equations based on plant physical data. The diameter at breast height (d.b.h.), measured at 130 cm above ground, was used to determine all necessary parameters.
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