Trees help filter out and reduce air pollutants that can affect health. Pollutants such as particulates, nitrogen oxides, halogens, ammonia and ozone are reduced.
Trees muffle noise and provide privacy.
Research shows that trees help reduce stress in the workplace and speed recovery of hospital patients.
Leaves reduce the amount of carbon dioxide (CO2), which contributes to global warming. A tree can absorb 11.8 kg of CO2 per year or about 2.5 tons per 1 hectare and replace it with life-giving oxygen.




A mature birch, with 200 000 leaves, may give off as much as 3.75 tons of water in a summer's day.
A tree in full leaf may lift 1 ton a day from the soil and carry it through an intricate system of pipelines to every leaf. Generally.
More than 90 percent of the water trees absorb cycles out through transpiration.
A mature tree's leaves may have a total surface area up to 24 times the size of the ground over which it is growing.
Trees keep excess phosphorus and nitrates found as pollutants in runoff from entering streams and rivers by using them as nutrients for their own growth.
Trees are critical to protecting wetlands, which in turn can dramatically decrease flood levels.