Trees are life and they add it with their presence, lifting your mood as well as providing shelter from the elements, be it wind, rain or shine. They attract birds, adding more life to the atmosphere, never mind bird pooh here and there. If it bothers, you can always wash the car.
Compare two areas, one with trees and one without. The one with looks fulfilled and complete, the other looking a tad barren, possibly lifeless.
Children in an area planted with trees would benefit by having some of the wonders of nature on their doorstep. They would also be provided with the absolute fun of tree climbing, the thrill of climbing to the highest point and being able to see far and wide, also the pleasure of telling mother afterward that she need not have worried, 'I didn't fall'.
Trees add to and fill the picture, enhancing that homely aura, completing the feeling that there is more to life than just simply living it.
