Switzerland study links tree arrangement to lower mortality rates

A long-term study in Switzerland has found that neighborhoods with many well-arranged trees have lower mortality rates. Researchers believe that the presence of trees may contribute to better health. However, they need to research further to understand the reasons behind this finding. Trees help create a pleasant environment in cities. They filter air pollution, provide shade, and encourage outdoor activity. Governments are setting tree-planting goals to combat climate change, but in crowded cities, it's challenging to find space for more greenery. Researchers from ETH Zurich and the National University of Singapore investigated the effect of trees on urban health. By analyzing high-resolution data on tree canopies and the health of over six million people, they studied how tree cover near homes impacted longevity. The results showed that having a high density of connected tree canopies is linked to lower mortality risks. This correlation was particularly strong in urban areas with poor air quality and high temperatures. While the study could not determine specific health benefits or causal links, it found consistent patterns with similar studies in other cities. Dengkai Chi, a researcher involved in the study, highlighted the need to focus on both the number and arrangement of trees. He suggested that cities should connect isolated green spaces, like creating tree-lined streets, to maximize health benefits. The researchers also noted that simpler tree canopy shapes might be more beneficial for health than irregular designs. These simpler forms offer larger areas for biodiversity and encourage people to use green spaces. However, the study acknowledged limitations, such as not considering individual health factors or how often people use parks. Future research aims to deepen understanding of these relationships and provide clearer recommendations for urban planning.