NgoSepthemba, iPacific Northwest Research Station yakhipha umbiko wayo othi “Calculating the Green in Green: What’s an Urban Tree Worth?”. Ucwaningo lwaqedwa eSacramento, CA nasePortland, NOMA.
UGeoffrey Donovan, isazi samahlathi socwaningo neSiteshi Sokucwaninga se-PNW, sinqume ukuthi izihlahla ezitshalwe eningizimu nasentshonalanga yezindlu zaseSacramento zehlise izikweletu zikagesi zasehlobo ngesilinganiso sama-$25.16. Ocwaningweni lwesibili e-Portland, ithimba lika-Donovan lithole ukuthi izihlahla zasemgwaqweni ezikhula ngaphambi noma eduze kwendlu zengeze isilinganiso sama-$8,870 enanini layo lokuthengisa futhi zanciphisa isikhathi sazo emakethe cishe ngezinsuku ezingu-2. Lezi zinzuzo zezomnotho zakapakela ezakhiweni ezingomakhelwane: isihlahla somakhelwane esikhula eceleni kwendlela yesokudla sengeze isilinganiso sama-$12,828 enanini elihlanganisiwe lazo zonke izindlu phakathi kwamamitha angu-100.
Ungafunda isifundo esigcwele lapha.