When living points need to have energy they take in oxygen for respiration. The oxygen returns for the atmosphere in the shape of carbon dioxide. Oxygen is one hard cookie: A 2012 research published from the journal Bodily Critique Letters observed than an oxygen molecule (O2) can endure pressures 19 https://oxygen-chamber-stoke-on-t86284.tkzblog.com/35656054/5-simple-statements-about-oxygen-chambers-for-cancer-treatment-explained