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    Author(s): David J. NowakRobert HoehnDaniel E. Crane
    Date: 2007
    Source: Arboriculture & Urban Forestry. 33(3): 220-226.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: View PDF  (98.25 KB)

    Description

    Urban forests in the coterminous United States are estimated to produce ≈61 million metric tons (67 million tons) of oxygen annually, enough oxygen to offset the annual oxygen consumption of approximately two-thirds of the U.S. opulation. Although oxygen production is often cited as a significant benefit of trees, this benefit is relatively insignificant and of negligible value as a result of the large oxygen content of the atmosphere. Other benefits of the urban forest are more critical to environmental quality and human health than oxygen production by urban trees.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Nowak, David J.; Hoehn, Robert; Crane, Daniel E. 2007. Oxygen production by urban trees in the United States. Arboriculture & Urban Forestry. 33(3): 220-226.

    Keywords

    air quality, environmental quality, tree benefits, urban forests

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