modeled-outcome-study source

Tree and forest effects on air quality and human health in the United States

A national model using 2010 local environmental data estimated 17.4 million metric tons of annual pollution removal by U.S. trees, while the average modeled air-quality improvement was less than one percent; it is not an Orlando intervention study.

Reviewed July 24, 2026

Nowak et al., Tree and forest effects on air quality and human health in the United States, Environmental Pollution 193 (2014) 119-129.

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Open at research.fs.usda.gov (opens in new tab)
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What this source supports

A national model using 2010 local environmental data estimated 17.4 million metric tons of annual pollution removal by U.S. trees, while the average modeled air-quality improvement was less than one percent; it is not an Orlando intervention study.

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Topic reviews: Protecting Orlando's Natural Beauty & Climate Future

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Last reviewed
July 24, 2026