The screening/filtering process involves 2 stages. The first stage eliminates large pieces of wood. The second stage reduces the amount of sawdust and dust.
Maximally reducing the dust in the product reduces the dust in the air of both you and your animals. Exposure to these dust particles can be unhealthy and harm upper respiratory tracts.
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.