In the 1980s Japan introduced forest bathing (being around trees) as part of its national health program. Known as shinrin-yoku, Japan has official forests based upon their unique physiological and psychological effects. The essential oils of trees (phytoncides) reduce stress and boost immunity.
Shinrin-yoku (meaning “forest bathing”) is considered a form of nature therapy in Japan which has positive effects on mental and nervous wellbeing. It consists essentially in taking long walks in forests.