Trees help prevent city flooding by catching raindrops and offsetting runoff caused by buildings and parking lots. Hospital patients heal faster, require shorter stays and less painkillers if room windows face trees. A tree-line buffer between fields and streams helps remove farming pollutants before they reach the water. Trees are the longest living and largest living organisms on Earth. In deserts, leaves absorb moisture from the dew and frost of the cool nights and release it to cool the air during the warm days.
Trees enhance the aesthetics of our environment.
Their grandeur, tenacity, and beauty are probably the most enjoyable aspect of trees. Tree bark and fruit have many medicinal properties, which are still being discovered. Two mature trees provide enough oxygen for a family of four. Birds and animals use trees for their homes and shelter and as a source of food. One person causes about 10 tons of carbon dioxide to be emitted a year.