taken this morning after I alleviated a horrid rattling sound on the upper deck of my train car by shoving some newspaper into the venting that runs along its entire upper length.
So, if the venting that is just three feet or so from our faces, which carries the air into our train car is THIS DIRTY...what does that say about the purity of the air which we breathe in each day??
Can someone answer that please?
black lung disease
