A new analysis from Yale University suggests that the dry waste from urban trees in the US—leaves, cuttings, and so on—could be diverted from landfills or incinerators and instead be reused to grow new trees, reduce logging, and lower carbon emissions.
But there’s a way to attack this problem on multiple fronts, using undervalued waste—from trees and people—that would otherwise be sent to landfill.from Yale University suggests that the dry waste from urban trees in the US—leaves, cuttings, and so on—could be diverted from landfills or incinerators, where much of it still ends up, and instead be reused to grow new trees, reduce logging, and lower carbon emissions.
The Yale researchers, led by Yuan Yao at the university’s Center for Industrial Ecology, calculated that converting leaves into compost, wood into chips and lumber, and the remaining tree residues into a charcoal-like substance called biochar, can be environmentally beneficial on several levels. “These products can be substitutes for virgin materials such as fertilizers, and thus reduce associated environmental impacts,” the authors write.
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