London’s dense population mirrors the world’s major cities, and scientists estimate that trees have saved over 150 lives in just eight years by reducing large areas of the city by up to 35°F (2°C). Unfortunately, many global cities have been uprooting trees to make way for concrete car parks and pedestrianized zones, forcing outdoor enthusiasts to head into urban areas for their exercise fix. However, these concrete jungles are not as healthy as natural ones, causing what is known as the “Urban Heat Island Effect.”
In Chicago, it is estimated that the city will see more than 30 more days per year where temperatures exceed 100 degrees Fahrenheit (37.8°C) due to higher temperatures exacerbating existing health conditions such as cardiovascular diseases, respiratory problems, and diabetes. Additionally, urban areas tend to have higher levels of air pollution without trees to filter the pollutants.
A groundbreaking study published in IOP Science shows that during the heatwave events of 2022, tree coverage in London helped avoid around 16 heat-attributable deaths. The study also highlights that increasing tree canopy coverage can help mitigate high urban temperatures in future climates. Therefore, it is essential to prioritize greening initiatives as part of a set of broader public health actions that can help reduce heat-related mortality in the future.
So next time you lace up your sneakers for a scenic run, remember to thank your leafy friends for their contribution towards improving your mental health and potentially saving your life.