There are billions of them in use, and when they are not in use or waiting to be used, what happens to them? They are all covered in germs. Germs, including some that are contagious, and some of those billions of masks are harboring the dreaded Wuhan/COVID virus. Most of these masks are used once or twice and then just thrown away. Think of the massive amounts that are entering the waste stream. Read this story for a sobering account of the mask production/waste cycle.
Scary!