Trees emerge as a force for good . Do you think trees can make us happier? “Trees appeal to all the senses, “Fresh smells, the sound of moving leaves and birdsong, the texture of the bark – all of these are appealing, especially in modern cities... They connect us to others, whether contemporaries or those in the past or future. If you plant a sapling that may take 200 years to reach its full stature, you are pledging faith in the future and offering a gift to the generations yet to be born. That’s a pretty good feeling.”