You are probably too Young or too unexperienced.
high school degree, basic chemistry or wikipedia wont stretch it when it comes to the real life.
Also, somehow You didn't answer my question "CO2 concentration of the air inside a lens". Its part of the optical design for top grade lenses.
Most of the fungus/bacterias issues in optics are due to that basic high school chemistry of the staff workers.
Military specs optics are exception.