It's simple! First turn off your Blueair air purifier and disconnect the power cord from the electrical outlet. Open the back door of the unit and remove the old filter and replace with the new one.
Close the back door and connect the power cord back into the electrical outlet to continue receiving cleaner air. More.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.