Adolescents in urban communities may have less aggressive behaviors if they live in neighborhoods with more greenery, such as parks, golf courses, or fields. Studies have shown that the families we grow up in, the places we work, and the friends we keep (our social environment) play a large role in influencing behavior. However, not much is known about how one's outdoor environment - such as the greenery in one's neighborhood - affects behavior.

Source: Greenery in Neighborhoods May Reduce Adolescent Aggressive Behavior