The benefits of trees
Urban forests consist of remnants of native forests and the planted and wooded landscapes of our cities. The urban forest is a valuable resource that provides economic, environmental, and social benefits. The quality of life in cities is enhanced when the canopy provides shade for our homes and streets, mitigating the effects of stormwater, providing energy savings, and improving property values. Research conducted in the United States indicates that for every dollar spent on urban trees, $2.70 in benefits is returned. Trees in our neighborhoods contribute to the quality of our lives and make our communities more livable.
As forests become fragmented due to urbanization and development, we lose a great deal of the ecosystem services provided by forests.
Cleaner Air
Trees clean our air. In one year, a 4 km2 (1 acre) area covered with trees can remove 1000 kg (1 ton) of carbon dioxide, equivalent to what a car produces driving up to 14,000 km. In one year, this same portion of land produces the amount of oxygen consumed by 18 people each year. A single tree produces nearly 118 kg of oxygen per year.
Shade and Reduced Energy Costs
Trees reduce energy costs for homes and other buildings. During hot summers, tree shade reduces interior temperatures, making air conditioning less necessary.
Increased Value and Reduced Costs for Properties
Properties with more mature trees and greater canopy coverage increase in value and sell faster than similar properties without trees. Trees also reduce noise pollution, an important consideration in urban environments. Trees prevent soil erosion, reducing the need for costly soil amendments or replacement.
Better Quality of Life
Trees generate good public relations as well as a positive response from neighbors. The protection of trees provides a healthier forest ecosystem and environment, leading to a safer and more livable community. Trees combat global warming by removing carbon dioxide from the air.
Source: ISA Pacific Northwest chapter of the International Society of Arboriculture (ISA Pacific Northwest chapter)
