Why You Need Trees

Trees play a quiet but measurable role in supporting mental health. Research consistently links contact with trees and green spaces to lower levels of stress, anxiety, and depression symptoms, as well as higher positive mood and vitality. These effects emerge from controlled studies and large-scale observations, not from isolated claims.

One line of evidence comes from forest therapy, also known as shinrin-yoku or forest bathing. A meta-analysis of randomized controlled trials and quasi-experimental studies found that forest-based interventions produced a large overall effect on mental health outcomes. Participants showed reductions in depression, anxiety, and negative emotions, alongside gains in positive emotions. Another systematic review and meta-analysis of shinrin-yoku reported significant short-term reductions in anxiety and depression symptoms, with particularly clear effects on anxiety. These benefits appeared across healthy adults and those with existing mental health challenges, though longer sessions and dynamic activities tended to yield stronger results.