Sap, the liquid that flows in trees, is used to make maple syrup, chewing gum, crayons, paint, and soap. Bark is used to make dyes and medicines. Leaves and roots provide oils for cosmetics and medicines. Just as important, trees provide jobs for people - foresters and nurserymen, for example. All of the products made from trees create many more jobs.
Trees provide food for people too.
Fruits like apples, pears, peaches and cherries come from trees. So do nuts like walnuts and hazelnuts. Trees make our world a nicer place. Image your neighborhood without trees. Parks and campgrounds would certainly not be the same without trees.