The Benefits of Trees  

Since 2005, Tree for All partners and community volunteers have planted more than eight million native trees and shrubs in the Tualatin Valley. Why do we do it? Here are just a few of the jobs trees do for our watershed.

Native trees and shrubs...

...filter runoff
Trees, shrubs and other plants filter pollutants such as oil, fertilizers, pesticides and dog waste.

...lower stream temperature
Shade from trees keeps water temperatures cool for fish and aquatic insects.

...stabilize stream banks
Root structures help hold the soil in place, preventing erosion and increasing water clarity.

...provide flood control
Trees slow water flow and give water a chance to soak into the ground.

...attract wildlife
Native trees and plants create habitat and food for birds and animals.

...mitigate climate change
The average tree can absorb up to 2,000 pounds of carbon dioxide over the course of its lifetime.

...raise property values
The proximity of mature trees adds value to residential property, according to a 2010 Forest Service study.

This program keeps on giving. The kids that help to plant the trees today, they can come back in future years and say, ‘I did that. I made that happen.’ That’s very important. It gives everybody a sense of being part of something important.
— Andy Duyck, Washington County Commission Chair

Did you know? 

For every five percent of tree cover added to a community, stormwater runoff is reduced by approximately two percent. [Source: Benefits of Urban Trees. Compiled by Keep Indianapolis Beautiful, Inc.] 

A single mature tree can absorb carbon dioxide at a rate of 48 pounds annually and release enough oxygen to support two people. [Source: McAliney, Mike. Arguments for Land Conservation: Documentation and Information Sources for Land Resources Protection, Trust for Public Land, Sacramento, CA, December, 1993] 

One acre of trees removes as much carbon dioxide from the air as is added by driving a car 26,000 miles. [Source: Lovasi, G.S. et al. “Children living in areas with more street trees have lower prevalence of asthma,” Journal of Epidemiology and Community Health, May 1, 2008. Pp. 647-649.]

The net cooling effect of a young, healthy tree is equivalent to ten room-size air conditioners operating 20 hours a day. [Source: Ohio Department of Natural Resources