By preserving and protecting mature trees on private property, on our streets and in our parks, we will continue to help renew and enhance San Diego's urban forest for future generations. Our urban forest provides us with many long-term environmental, social and economic benefits.

Climate Benefits

• Tree foliage filters dust and can help remove toxic pollutants from the atmosphere. The foliage captures and removes a wide range of smog-producing compounds such as ozone, carbon monoxide, nitrogen oxide, airborne ammonia and some sulfur dioxide.
• Mature trees help to cool and freshen the air we breathe. Not only do they moderate the air temperature, but through photosynthesis, their leaves take in carbon dioxide and release oxygen for us to breath.
• Trees intercept rainwater aiding soil absorption for gradual release into streams, preventing flooding, filtering toxins and impurities, and extending water availability into dry months when it is most needed.
• Water from roots is drawn up to the leaves where it evaporates. The conversion from water to gas absorbs heat, cooling hot city air.

Neighborhood Benefits

• Mature trees improve our aesthetic environment, absorb noise, are traffic calming, reduce stress and crime, and create a peaceful place to relax or socialize.
• Trees provide positive mental benefits and healing qualities.

For more information on benefits of trees, visit the Tree Facts page on the Arbor Day Foundation website.