2024 Yes Inverse relationship between urban green space and childhood autism in California elementary school districts https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6104398/ Wu, Jianyong North America Experimental Epidemiological Students Elementary (K-5) Green space Vegetation Air pollution Autism spectrum disorder (ASD) Greenness Near-road tree canopy School children Autism prevalence across 543 California school districts was analyzed using green space metrics and regression models. Tree canopy and other vegetation were linked to lower autism rates in high-traffic areas, suggesting environmental protective effects. 2017