Beech trees seen from the forest floor. This image was taken in a forest named Bøkeskogen in Larvik city, Norway. Baac3nes/Getty Images hide caption
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Researchers say there's growing evidence that nature has a powerful effect on us, improving both our physical and psychological health. Angela Hsieh hide caption
Researchers say there's growing evidence that nature has a powerful effect on us, improving both our physical and psychological health. Angela Hsieh/NPR hide caption