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  4. United States Environmental Protection Agency, Air Pollution and Cardiovascular Disease Basics

  5. Oxford QJM International Journal of Medicine, Improved Antioxidative Protection in Winter Swimmers

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  7. NASA, Plants Clean Air and Water for Indoor Environments

  8. NIH National Library of Medicine, Potential Effectiveness of Point-of-Use Filtration to Address Risks to Drinking Water in the United States

  9. Penn Medicine News, Penn Medicine Study Links Air Pollution, Heat, Carbon Dioxide, and Noise to Reduced Sleep

  10. Center for Disease Control and Protection, Effects of Light on Circadian Rhythm

  11. National Institute of Mental Health, Section on Light and Circadian Rhythms

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  13. NIH National Library of Medicine, Physiology, Noradrenergic Synapse

  14. Journal of Physiological Anthropology, Effects of Thermal Environment on Sleep and Circadian Rhythm

  15. G.F. Smith International

  16. Whoop, Ways to Activate the Vagus Nerve and Boost HRV & Immunity

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  18. Harvard T.H. Chan School of Public Health, Office Air Quality May Affect Employees’ Cognition, Productivity

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  20. NIH National Library of Medicine, What Is the Role of Dietary Inflammation in Severe Mental Illness? A Review of Observational and Experimental Findings

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  23. Smithsonian Magazine, Fractal Patterns in Nature and Art Are Aesthetically Pleasing and Stress-Reducing

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