Fast Fact Library

Meadows offer higher levels of soil microbial biodiversity as compared to lawns, according to a study of bacteria and fungi in small-scale meadows that showed higher levels of mycorrhizal fungi and soil chemistry...

Tessler, Michael, Felix J. David, Seth W. Cunningham, and Emily M. Herstoff. Rewilding in Miniature: Suburban Meadows Can Improve Soil Microbial Biodiversity and Soil Health. Microbial Ecology 85, 1077–1086 (2023). https://doi.org/10.1007/s00248-023-02171-4

Urban greenery can play a significant role in absorbing atmospheric carbon dioxide. According to a Columbia University study, trees, shrubs, flowers, herbs, and grasses in the five boroughs of New York City...

Wei, Dandan, Andrew Reinmann, Luke D. Schifer, and Roisin Commane. High resolution modeling of vegetation reveals large summertime biogenic CO₂ fluxes in New York City. Environmental Research Letters 17, 12 (2022). https://doi.org/10.1088/1748-9326/aca68f.

Street trees can reduce non-accidental and cardiovascular mortality. In a study of street trees planted in Portland over 30 years, planting 11.7 trees annually in each census tract was associated with 15.6 fewer non...

Donovan, Geoffrey H., Jeffrey P. Prestemon, Demetrios Gatziolis, Yvonne L. Michael, Abigail R. Kaminski, and Payam Dadvand. “The association between tree planting and mortality: A natural experiment and cost-benefit analysis.” Environment International 170 (2022). https://doi.org/10.1016/j.envint.2022.107609.

According to a study of 17 sites in the Northeastern and Southeastern United States, asphalt intersections or crosswalks with improvements such as crosswalk art, intersection murals, painted plazas, or sidewalk...

Schwartz, Sam. (April 2022). “Asphalt Art Safety Study: Historical Crash Analysis and Observational Behavior Assessment at Asphalt Art Sites.” Bloomberg Philanthropies. https://assets.bbhub.io/dotorg/sites/43/2022/04/Asphalt-Art-Safety-Study.pdf

A cost-benefit analysis based on existing green schoolyards in California compared a green schoolyard prototype with a gray schoolyard prototype. Over a 20-year period, the green schoolyard's cumulative net cost was...

Trust for Public Land and MKThink. (2022). “California Green Schoolyards: A Cost-Benefit Study.” https://www.tpl.org/sites/default/files/220511_TPL_GSY_Report_Final.pdf.

Quality pollinator habitat can be created beneath solar arrays. In an Oregon experiment, researchers found that pollinator abundance, diversity, and richness as well as pollinator-flower visitation rates were...

Graham, Maggie, Serkan Ates, Andony P. Melathopoulos, Andrew R. Molkdenke, Sandra J. DeBano, Lincoln R. Best, and Chad W. Higgins. ”Partial shading by solar panels delays bloom, increases floral abundance during the late-season for pollinators in a dryland, agrivoltaic ecosystem”. Scientific Reports 11, 7452 (2021). https://doi.org/10.1038/s41598-021-86756-4.

A statistical analysis of a 3D model of a Columbus, Ohio neighborhood estimated that if the neighborhood's trees were all mature, surface temperatures would be lowered by 3.48° F. 20 additional mature trees would...

Park, Yujin, Jean-Michel Guldmann, and Deshen Liu. “Impacts of Tree and Building Shades on the Urban Heat Island: Combining Remote Sensing, 3D Digital City and Spatial Regression Approaches.” Computers, Environment and Urban Systems 88 (2021): 131. https://doi.org/10.1016/j.compenvurbsys.2021.101655.

Greening in and around schoolyards can improve academic achievement. A study of 450 public schools in Washington state showed positive relationships between school greenness and academic achievement in sixth graders...

Kuo, Ming, Samantha E Klein, Matthew HEM Browning, and Jaime Zaplatosch. “Greening for academic achievement: Prioritizing what to plant and where.” Landscape and Urban Planning 206 (2021). https://doi.org/10.1016/j.landurbplan.2020.103962.

A systematic review of research on the effectiveness of nature-based solutions for addressing climate impacts showed that that of 293 interventions, 59% reduced adverse climate impacts. Overall, the studies that...

Chausson, Alexandre, Beth Turner, Dan Seddon, Nicole Chabaneix, Cécile A. J. Girardin, Valerie Kapos, Isabel Key, Dilys Roe, Alison Smith, Stephen Woroniecki, and Nathalie Seddon. “Mapping the effectiveness of nature-based solutions for climate change adaptation.” Global Change Biology 26, 11 (2020): 6134-6155. https://doi.org/10.1111/gcb.15310.

Some plants are more effective than others mitigating air pollution with vegetated roadside buffers. Small, stiff, and complex leaves are generally more effective than larger, less rigid and less complex leaves...

Barwise, Yendle, and Prashant Kumar. “Designing vegetation barriers for urban air pollution abatement: a practical review for appropriate plant species selection”. npj Climate and Atmospheric Science 3, 12 (2020). https://doi.org/10.1038/s41612-020-0115-3