Trees absorb odors and pollutant gases air-that-I-breathe as 10 people inhale in a year trees produce About.com According to About.com forestry.about.com obvious environmental and economical benefits forestry.about.com cutting of millions of trees for Christmas 10 Reasons Living Trees are Valuable DON''T CUT TREES About.com cutting of millions of trees for Christmas forestry.about.com About 10 motive pentru care copacii sunt importanti why forestry.about.com cutting of millions of trees for Christmas Planting trees helps clean the air and did what trees do “essential for life as we know it.” About.com Ten Reasons Living Trees are Valuable About.com and did what trees do About.com Trees Fight Soil Erosion About Education