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Which species of trees should we be planting in the urban environment to best soak up pollutants containing toxic heavy metals? Stefanos Tsiaras of Aristotle University of Thessaloniki and Theano Samara of the Forest Research Institute of Thessaloniki, in Greece, hope to answer this question. The team discusses the requirements of the urban environment in terms of arboreal planting in the International Journal of Sustainable Agricultural Management and Informatics.
The team has assessed five of the most common tree species found in green spaces in urban Greece—Cupressus arizonica (Arizona cypress), Albizia julibrissin (Persian silk tree), Platanus orientalis (Old world sycamore), Celtis australis (European nettle tree), and Ligustrum japonicum (wax-leaf privet). They used the PROMETHEE (Preference Ranking Organization METHod for Enrichment Evaluation) method to take into consideration various criteria and especially the sequestration of seven heavy metals: cadmium, chromium, copper, lead, manganese, nickel, and zinc.
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Why do democrats never have to face the reality of what's on the ground, like 2000 years of marriage.