{"text":"When discharging industrial gas into the indoor environment in high altitude astronomy, we never wore breathing respirators that fed us oxygenated air at above the legally required 19.5% oxygen levels.","author":"Steven Magee","tags":["air","altitude","astrobiology","astronomer","astronomical","astronomy","astrophysics","astrosociobiology","breathing","discharging","environment","fed","gas","high","indoor","industrial","legally","levels","liquid","osha","oxygen","oxygenated","respirators"],"id":39288,"author_id":"Steven+Magee"}