Scientists also have come to find a rational beauty in trees. Not only are air-conditioning costs reduced, but efforts to combat global warming are assisted. If this weren't enough, the leaves and branches of trees slow the movement of raindrops, lessening soil erosion and storm sewer system overload. Trees have also been found to reduce air pollution, by removing particulate matter from the air, while restoring oxygen to the atmosphere. One answer is to include trees in the comprehensive city or town plan.
Shade trees are as important to most people as traffic lights, garbage trucks, and storm sewers.
If the message of global warming has filtered down, then I suspect planting more trees will become of much greater concern, very soon.