Level of residential neighborhood greenness is associated with less problematic behavior in children, particularly aggressive behaviors and attention problems, according to a study of 1,817 South Korean schoolchildren that controlled for age, sex, physical activity, monthly family income, and more.
Lee, Mihye, Suejin Kim, and Mina Ha. “Community greenness and neurobehavioral health in children and adolescents” Science of The Total Environment 672 (2019): 381-388. https://doi.org/10.1016/j.scitotenv.2019.03.454.