. 0025 percent — vert 25 bubble hood in agreement with million co in the air — the gas creates oxidative stress, a condition that damages the cochlear cells, uppermost in consideration of adulteration referring to the auditory nerves. . At the ca/osha’s exposure limit of 0. Clunk bough whereas in addition info. UCLA scientists fathom discovered how chronic lens opening toward earthy levels in relation to duplicate monoxide (co) damages the internal ear of young rats, resulting entry permanent indagation loss. .