2018 Yes https://www.frontiersin.org/articles/10.3389/fpsyg.2018.02074/full Tallis, Heather North America Review Students Elementary (K-5) Test Performance Attention restoration theory Ecosystem services Conservation Urban green space Education Standardized test data from 495 California elementary schools were analyzed with tree and shrub cover near campuses. Urban greenery predicted performance more than poverty in some cases, supporting tree planting as a strategy to close academic gaps.