wˌaɪl ɪɾ ɪz pˈɑːsᵻbəl fɔːɹ hjˈuːmənz tə bɹˈiːð pjˈʊɹ ˈɑːksɪdʒən, ɐ pjˈʊɹ ˈɑːksɪdʒən ˈætməsfˌɪɹ wʌz ˈɪmplᵻkˌeɪɾᵻd ɪnðɪ ɐpˈɑːloʊ wˈʌn fˈaɪɚ.
While it is possible for humans to breathe pure oxygen, a pure oxygen atmosphere was implicated in the Apollo 1 fire.