by Michael Kirschman
Budget being cut? Interpretive positions at your site being eliminated, or at risk of being eliminated? If so, welcome to the “new” economic reality—“new” only in the broadest sense of the word, as interpreters seem to face this dread on a yearly basis regardless of the economic climate. The fact is our services are usually not valued at the same level as mandated services such as police, fire, social services, and schools. Yet the open spaces we typically protect and interpret—nature preserves, forest preserves, conservation areas, parks, watershed properties—arguably provide a far greater return on investment than most realize.
According to Larry Beck and Ted Cable, interpretive programs must be capable of attracting support—financial, volunteer, political, administrative—whatever is needed for the program to flourish. This has never been truer, yet many of us wonder, “How can I, as a frontline interpreter or site manager, actually gain true, sustained political and administrative support?” One way is to learn and speak the language of your administrators and decision makers. In other words, “Know your audience!”

Plants are nature’s air filters, removing pollution and saving us money. This beechwood tree is found at Latta Plantation Nature Preserve.
Arguably, never before has the need and desire by the public for natural areas, access to nature trails and facilities, and nature-based outdoor programming been so strong at both the local and national level. Yet, all too often these services are overlooked, forgotten about, and dismissed as being less important by those holding the purse strings. The justifications for mandated services have become so strong in some municipalities, we must ask, Does this hold up? Are the benefits of our programs and facilities truly that minimal? What are the true comprehensive benefits of our services? and Can these benefits be quantified?
Most decision makers want to make informed decisions. To do so, they need to have quantifiable data that stands up to public scrutiny. Unfortunately, all too often interpreters depend solely on anecdotal comments, visitation estimates, or vague “quality of life” innuendos to justify their services.
To assist decision makers in Mecklenburg County, North Carolina, data was compiled on the environmental, economic, and health benefits of our nature preserves. Combined, these benefits provide a conservative five-to-one return on investment. Armed with this data, interpreters can now relate the “true value” of our preserves. Interpretive themes have also been developed to highlight benefits of specific nature preserves. For example, “Your community is healthier with nature next door” is the new thematic foundation for one preserve that protects our city’s drinking water. Following is a brief overview of the benefits and the associated values determined for Mecklenburg County nature preserves.
Water Quality Benefits
The benefits of protecting open space, tree canopy, and watersheds are extensive, as there are direct correlations to water quality. Even relatively impermeable forest soils, such as those found in Charlotte, can absorb a one-inch rainfall. Remove those trees and replace them with roads, parking lots, and roofs, and the same rainfall produces 27,000 gallons of runoff per acre.
A 2003 analysis found our preserves have a storm water retention capacity of 29 million cubic feet per year. Furthermore, this value can be conservatively estimated at $58 million, which equals a $2 per cubic foot of construction cost to build a facility capable of filtering this amount of storm water. This does not include yearly operating costs.
Air Quality Benefits
Urban forests reduce the effects of air pollution by removing carbon dioxide, sulfur dioxide, carbon monoxide, ozone, and particulate matter. Using City Green software, it was determined the trees within our nature preserves remove 458,000 pounds of pollution every year. This service can conservatively be estimated at $2,210,000 per year, based on a 2005 study for the city of Houston.
Economic Benefits: Increased Property Values, Tourism, and Direct Revenue
Although not well known (or interpreted), nature preserves provide significant economic benefits. The greatest of these derive from higher sale prices and higher property taxes via the “proximity effect,” or hedonic value. It results from the fact that people are willing to pay more for homes near parks, especially natural areas. The resulting higher sale price and associated taxes paid by an owner represent direct, immediate, and on-going economic returns. On average, properties adjacent to passive properties such as preserves experience a 20 percent increase in value. This declines to zero for properties 2,000 feet away. Using these estimates and public tax records, the adjacent 2,026 property owners and 3,146 nearby property owners living within just 1,000 feet of Mecklenburg County nature preserves provided an extra $1,181,878 to the tax base in 2008.
Tourism impacts can be calculated using local tourism spending data ($98.60/day) and preserve visitation data (75,000 tourists/year), which indicates the preserves contribute $7,395,000 in tourism every year. Additionally, revenues from programs, campground fees, shelter rentals, boat launch fees, and the nature center gift shops were approximately $230,000 in 2008. Combined, the economic impacts of the preserves exceed $8.8 million each year.
Health Benefits
Nature provides significant health benefits, one being stress reduction. According to Stress Directions, Inc., stress is recognized as a major drain on corporate productivity and competitiveness. Stress Directions, Inc., calculates that $300 billion, or $7,500 per employee, is spent annually on stress-related issues. Since over 100 studies find that spending time in nature reduces stress, it can be argued nature preserves and their facilities have a positive impact on the health of our residents. As mentioned in Richard Louv’s Last Child in the Woods, even rooms with a view of nature help protect children against stress. Researchers have found that children with more nature near their homes have lower levels of behavioral disorders, anxiety, and depression. Other fascinating studies clearly show the benefits even a view of nature or a walk in nature can have on the office worker. And of course it has long been known that hospital rooms with views of trees or nature contribute to faster recovery times and discharges.
Additional studies cited by Louv find that children with nature near their home report lower levels of behavioral conduct disorders, anxiety, and depression. Incredibly, studies even suggest that nature can be used as therapy for attention deficit hyperactivity disorder (ADHD). A study of children with ADHD found that walks outdoors appeared to improve attention and concentration. The researchers found that a dose of nature worked as well as a dose of medication to improve concentration, or even better.
Without a doubt, thousands of children with ADHD hike, walk, and explore Mecklenburg County nature preserves. The value of these health benefits may be hard, if not impossible, to calculate but they cannot be denied—and should always be highlighted in any justification for services.
Conclusion
Mecklenburg County residents and elected officials value nature preserves. However, do they truly understand the magnitude of their benefits? Combined, the benefits exceed a staggering $69 million. Excluding the large water quality benefit, a conservative estimate still exceeds $11 million per year. This is based solely on air quality benefits and quantifiable economic impacts. Since the preserves operate on a $3.1 million budget, this represents a nearly 350 percent return on investment and doesn’t even include the well-documented (but unquantifiable) benefits to health.
Other studies find similar results. A 2008 report showed Philadelphia parks provide about 100 times the amount the city spends on them each year. Similarly, a 2009 New York State Parks study concluded the 55.7 million park visitors support $1.9 billion in economic activity and 20,000 jobs. Furthermore the benefits exceed the direct costs of maintaining the state parks by a ratio of more than five to one. Another North Carolina State Parks study concluded each park in the system produced an economic return ranging from 1:1.8 to 1:25.1, meaning that for each dollar the state invested in a park, between $1.80 and $25.10 was generated.
These studies use sound economic theory and models to calculate impacts. This is the language of our decision makers. And if you can learn it, this is the type of information that can help ensure the continued success of your program.
How successful has Mecklenburg County been? Last fall, during a declining economy, residents passed a $250 million park and recreation bond package, the largest in state history. This followed a $36 million land bond in 2007, of which $31 million was earmarked for nature preserves. The county is planning to open five new preserves, replace an aging nature center, and build a new fourth nature center. Operating funding has steadily increased over the past five years, with our first operating cuts in years occurring this fiscal year. However, even with these recent cuts, no educators or interpreters were cut, all preserves and nature centers remain open, and no programs were cancelled.
An understanding of the environmental, economic, and health benefits provided by your site can be critical to its long-term success. Elected officials and decision makers truly desire to make informed decisions regarding government services, and it is your responsibility to ensure this information is clearly understood and incorporated into any decision-making process. I think Beck and Cable would agree—we as interpreters must know our audience and learn to speak their language if we’re to expect the support we need.
For More Information
American Forests. (2003). Urban Ecosystem Analysis Mecklenburg County, North Carolina. www.americanforests.org.
Beck, L., and Cable, T. (Eds.). (2002). Interpretation for the 21st Century. Champaign, IL: Sagamore.
Center for Applied GIS and the UNC Charlotte Urban Institute. (2008). Forecasting Urbanization in the Carolina Piedmont Region.
www.gis.uncc.edu/ospc.
Crompton, John. (2004). The Proximate Principle: The Impact of Parks, Open Space and Water Features on Residential Property Values and the Property Tax Base. National Recreation and Park Association.
Greenwood, Jerusha and Candace Vick. (2008). Economic Contribution of Visitors to Selected North Carolina State Parks. Recreation Resources Service and NC State University.
Heintz, J., Pollin, Robert & Garrett-Peltier. (2009). The NYS Park System: An Economic Asset to the Empire State. Political Economy Research Institute University of Massachusetts Amherst.
Louv, Richard. (2008). Last Child in the Woods: Saving Our Children from Nature-Deficit Disorder. Chapel Hill, NC: Algonquin Books.
Mecklenburg County Land Use and Environmental Services Agency. (2008). State of the Environment Report 2008.
North Carolina Division of Parks and Recreation. North Carolina Outdoor Recreation Plan 2003–2008.
Outdoor Industry Foundation. (2006). Outdoor Recreation Participation Study. Eighth edition for year 2005. www.outdoorindustryfoundation.org.
The Trust for Public Land. (2008). How Much Value Does the City of Philadelphia Receive from its Park and Recreation System?
U.S. Department of the Interior, Fish & Wildlife Service, and U.S. Department of Commerce, U.S. Census Bureau. 2006 National Survey of Fishing, Hunting, and Wildlife-Associated Recreation.
U.S. Forest Service and Texas Forest Service. (2005). Houston’s Regional Forest.
Michael Kirschman is the division director for nature preserves and natural resources in Mecklenburg County, North Carolina. He will be a featured speaker during the Interpretive Management Institute at the NAI National Workshop in Hartford, Connecticut. (Visit www.interpnet.com/workshop for information.) Contact him at Michael.Kirschman@MecklenburgCountyNC.gov.