A study of low-income urban children before and after moving to different homes found that children whose new homes had the greatest increase in views of greenery and nature also had the highest levels of cognitive functioning in tests administered months after the move.
Wells, Nancy M. (2000). At home with nature: Effects of “greenness” on children’s cognitive functioning. Environment and Behavior, 32, 775-795. https://doi.org/10.1177/00139160021972793