Actually now we learn the importance of wearing mask and not only for keeping safe from Covid Virus infection but also for cleaner air we breath .
However, most of people wear cheap masks, that only protect from a direct contact of bacteria and human breathing pipes. Plus it is not recommended to wear mask for more than few hours; they should be changed regularly. And what people do? Put on a cheap mask and wear it for weeks.
You say that through mask people breath with a cleaner air? How can that be possible? Such masks should have built in charcoal air filter and be bulky. Put on a mask, come near smoky cars pipe and try to breath. Will you get a cleaner air?
Where are you getting this "it is not recommended to wear masks for more than few hours" thing.
Do you think opposite and think that it is good to wear
this for more than a day? Will you wear it for a whole day? It can be worn for a whole day, but you should not take it off. But how most people do - put on mask, touch things around, put off mask and put it in the pocket with bacterial hands, then put it on again, then put off and etc. By the end of the day there will be a whole periodic table on the mask
I did not say "it is not recommended to wear masks for more than few hours" only. Re-read my post. I have said that it is not recommended to wear one and the same mask for hours. It should be changed regularly. You have mentioned doctors - ok. They don't use same gloves for whole day, they change it with every patient. Same is with the mask, they must be changed regularly.
P.S. Why do you even quote me? Look a the guy I've quoted. He said that wearing masks creates clean air. This is more illogical. Or you agree that if everybody puts on the masks, we will make environmental more clear? Maybe we should put on huge masks on factory pipes then?