What about those examples generates brake dust more than any other business? Mechanics replacing brakes doesn't generate new brake dust.
How does it bother the outside world if there's metal shavings in a machine shop? They save and recycle those for - they aren't just dumping them in the street.
How does it bother the outside world if there's metal shavings in a machine shop? They save and recycle those for - they aren't just dumping them in the street.