Robert Thomas - BBC Wales Mon, May 25, 2026 at 6:04 a.m. UTC 3 min read Add Yahoo as a preferred source to see more of our stories on Google. Coastal towns are among the worst affected, the tree charity claims [Getty Images] A shortage of trees has turned some towns and cities into "tree deserts", leaving residents more exposed to the risk of poor health, air pollution and rising temperatures, a conservation charity has warned.