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urban trees in the US sequester substantial carbon
Urban Trees Sequester Substantial Carbon

urban trees sequester carbon

doc-titleCarbon storage and sequestration by urban trees in the USA
quoteBased on field data from 10 USA cities and national urban tree cover data, it is estimated that urban trees in the coterminous USA currently store 700 million tonnes of carbon ... with a gross carbon sequestration rate of 22.8 million tC/yr ... Urban forests can play a significant role in helping to reduce atmospheric carbon dioxide levels. Urban forests likely will have a greater impact per area of tree canopy cover than non-urban forests due to faster growth rates, increased proportions of large trees, and possible secondary effects of reduced building energy use and consequent carbon emissions from power plants.
sourceNowak and Crane, USDA Forest Service