Hypoxia, even when mild, 
<http://www.ncbi.nlm.nih.gov/pubmed/12212624>has been shown to worsen 
mood and amplify feelings of tension and fatigue. Effects can even 
linger for several months after regular oxygen exposure has been restored.

<http://www.aolnews.com/surge-desk/article/university-of-utah-researchers-link-higher-altitudes-to-suicide-risk/19635230>http://www.aolnews.com/surge-desk/article/university-of-utah-researchers-link-higher-altitudes-to-suicide-risk/19635230 


www.peoplewho.org