That's an article. Theres quite a long list of scientific peer reviewed trials in the actual medical literature i.e pub med that would say the opposite. Masks don't work. Just because WHO did a u turn doesn't make them work. They should be reserved for the hospital environment. To see them used and then littered all over town and country is another unwanted effect of bad government decision making. To see individual citizens turning on one another on here and in supermarkets over false science is also regrettable. I wont be wearing one and many people who do are wearing them entirely incorrectly. Therefore they are fooling themselves, wasting money and damaging the environment.
It's an article summarising the reasons why the CDC changed their guidance on wearing masks.
They are better placed than any of us to understand the actual medical literature.
The evidence they have cited is very persuasive to me, everything from trial studies of droplets produced, to the data from different countries, to actual case studies e.g. of infected hairdressers or airline passengers.
It is the same evidence that has persuaded authorities in US states and EU countries, and the European CDC, to roll them out in more and more settings.
If you look at the figures for cases in health and nursing home settings in this country, the numbers drop dramatically in late April after their HSE changed their guidance on masks.
So clearly masks are effective in hospital and care environments.
Masks do work are suppressing transmission of the virus by droplets.
This is not just wearing of masks by health staff as PPE but wearing of masks by suspected patients to reduce the viral load they produce.
"False science" is a pretty strong claim and to be honest nothing you have quoted in support so far in any way justifies it.
The litter angle is a red herring.
There's disused tissues on the street, does that mean governments shouldn't have advised people pre-mask to cough or sneeze into tissues?