Trees Have Global Value
A major international study estimated that the world’s forests provide environmental services—like clean air, water storage, and climate regulation—worth about $4.7 trillion per year.
A Case Study: Chicago’s Urban Forest
A detailed study looked at the costs and benefits of planting and maintaining 95,000 trees in the Chicago area over 30 years. The findings were eye-opening:
- The benefits of cleaner air, reduced energy use, better water management, and more outweighed the costs by nearly 3 to 1.
- On average, each tree returned $402 in net value (benefits minus costs).
- The typical payback period for these trees ranged from 8 to 19 years, depending on species, location, and other factors.
Trees Come With Upfront Costs
Even though trees provide incredible value, they still require investment:
- Planting and maintenance costs include money, time, and labor.
- Without proper care, trees can cause problems like:
- Uprooted sidewalks
- Clogged streets and culverts from fallen leaves
- Damage to power lines and underground utilities
These issues bring real costs to communities and property owners.
Value, Benefits, and Costs of Urban Trees
The U.S. population has grown increasingly urban each decade, from 28 percent in 1910 to 80 percent in 2000 (U.S. Census Bureau, 2002). In the Chesapeake watershed alone, residential development is predicted to consume 800,000 acres between 2003 and 2030, nearly 90 percent of it replacing farmland (Boesch and Greer, 2003). As urban communities grow larger and faster than ever before, natural resource management in these areas becomes crucial for achieving sustainable development and maintaining and enhancing the quality of life and the environment.
