{"text":"During my time in high altitude astronomy, I routinely witnessed workers breathing medical oxygen, industrial carbon dioxide, nitrogen and helium gas as part of their daily work routine.","author":"Steven Magee","tags":["altitude","astrobiology","astronomer","astronomical","astronomy","astrophysics","astrosociobiology","breathing","carbon","daily","dioxide","during","gas","helium","high","industrial","liquid","medical","nitrogen","osha","oxygen","routine","time","witnessed","work","workers"],"id":130797,"author_id":"Steven+Magee"}