bhai, these ordinary masks are good for nothing, only a show off.
and may be good for, like preventing sneezing and coughing onto others etc
what/how to define pollution
for common people, jo dikhta hai voh pollution hai and jo nahi dikhta voh pollution nahi hai
for example a car running on diesel and emitting smoke (as we can see black color of smoke) is creating pollution but a car on CNG is not creating pollution, as one cant see the color of pollutant gases, being colorless
and similarly other examples of industrial pollutants and about our daily routine.