Mask mandates are very much in the news; seems most have already made up their minds as have those regarding forced vaccinations.
I recently observed an electrician demonstrating a portable electronic meter that is used in confined spaces prior to entry. It detects not only oxygen deficiencies and unsafe carbon dioxide levels, but gases such as methane (combustible gas from flatulence) and carbon monoxide.
He did not indicate if it also detected other noxious gases such as ammonia or sulfide compounds, or volatile gases associated with petroleum or other poisonous chemicals. He merely held the detector end outside his face mask and turned it on; the meter was silent. Then he placed it beneath his surgical mask in the same environment, and it alerted.
Obviously, it detected an oxygen deficiency and/or excess carbon dioxide levels (no carbon monoxide unless the individual was a heavy smoker). This is what a mask wearer must breathe if forced to mask in normal air.
I am not saying masks are not totally inappropriate. In certain conditions I believe they will lessen the spread of germs or the virus if someone is coughing or sneezing, but for just normal use they are not healthy and contribute to less than desirable oxygen intake.
Is long-term mask use a greater health issue and concern, or is the false security mask wearers project more important? The mask issue to me is more about control and over-stepping in government than about disease prevention and safeguarding one's health.