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Highlight IDTitleStrategic Program Area(s)YearStation
Photo of Trees in New York City Central Park. Dave Nowak, USDA Forest Service
ID: 472
Carbon Sequestration by Urban Trees Valued in the Billions of Dollars Annually

Forest Service scientists quantified carbon storage and sequestration by urban trees in the United States to assess the magnitude and role of ur ...

Principal Investigator : David J. Nowak

Resource Management and Use2013NRS
Photo of Tree cover change in urban areas by state
ID: 1431
Declining U.S. Urban Tree Cover

Urban forests in the United States conservatively provide over $18 billion in annual benefits. Between 2009 and 2014, tree cover in urban areas ...

Principal Investigator : David J. Nowak

Resource Management and Use
Water, Air, and Soil
Inventory and Monitoring
Outdoor Recreation
2018NRS
Photo of Kayakers in Freshkills Park, NYC. Forest Service
ID: 54
From World's Largest Landfill to New York City's Newest Park

The story of the restoration of Fresh Kills Salt Marsh, Staten Island, NY

Principal Investigator : Lindsay K. Campbell

Resource Management and Use
Outdoor Recreation
2012NRS
Photo of i-Tree user distribution by country.
ID: 1219
i-Tree grows to more than 180,000 users in 130 countries

i-Tree is a series of freely available tools that aid people in quantifying the benefits and values derived from trees and forests and in under ...

Principal Investigator : David J. Nowak

Outdoor Recreation
Inventory and Monitoring
2017NRS
Photo of Infestation of European buckthorn (Rhamnus cathartica L.) on left with bush honeysuckle on right. Chris Evans, River to River Cooperative Weed Management Area, Bugwood.org
ID: 68
Nature Dominates in City Tree Regeneration

Assessment of tree planting and natural regeneration in cities reveals that most trees in cities are not planted

Principal Investigator : David J. Nowak

Resource Management and Use2012NRS
Photo of Social assessment crew member interviews park user on Jamaica Bay. Joana Chan, USDA Forest Service
ID: 638
Scientists Assess Social Meaning of Jamaica Bay Region Parkland

The Jamaica Bay region of New York City is a focus of resiliency planning and adaptive management efforts. Working with natural resource manager ...

Principal Investigator : Lindsay K. Campbell

Resource Management and Use2014NRS
Photo of Million Trees NYC Volunteers in Action City of New York / NYC Parks - NYC Parks
ID: 845
Tree Planting Programs a Gateway to Strong Civic Engagement

This study examined how tree planting projects can make an important difference to the social fabric of dense urban communities. Qualitative int ...

Principal Investigator : Erika Svendsen

Resource Management and Use
Outdoor Recreation
2015NRS
Photo of Estimated removal per square kilometer of land (tonnes km2) of all pollutants (NO2, O3, PM2.5, SO2) by trees per county in 2010. USDA Forest Service
ID: 634
Trees Improve Human Health and Save Lives

Air pollution is a serious health concern. Trees offer surfaces that remove gaseous and particulate air pollutants. Modeling of local environmen ...

Principal Investigator : David J. Nowak

Resource Management and Use2014NRS
Photo of
ID: 89
U.S. Urban Tree Cover Declining

Analysis of aerial images reveals that U.S. urban areas are losing about 20,000 acres of tree cover per year

Principal Investigator : David J. Nowak

Resource Management and Use2012NRS
Photo of
ID: 218
Urban and Community Forest Summaries for the Lower 48 States

NRS scientist David Nowak and others have recently published several important summaries of tree and forest information.

Principal Investigator : David J. Nowak

Resource Management and Use2010NRS
Photo of Trees alter the microclimate around buildings and affect energy use.
ID: 1216
Urban Trees Save Billions of Dollars Through Reduced Energy Costs

Trees in U.S. urban and community areas reduce residential energy use by an average of 7.2 percent, which equates a national savings of $7.8 bil ...

Principal Investigator : David J. Nowak

Outdoor Recreation
Inventory and Monitoring
2017NRS