https://www.premierhealth.com/your-health/articles/women-wisdom-wellness-/5-Ways-Mother-Nature-Can-Lift-Your-Mood/#:~:text=A%20Stanford%20University%20study%20found,the%20brain%20associated%20with%20depression.
https://www.itdp.org/2019/05/23/high-cost-transportation-united-states/