Following recent Apprenticeship exposure to Environmental Health and Safety, I have concerns over the external storage of Mild Steel Tube (MST) which is exposed to the elements, causing rust and corrosion, and whether this can generally be damaging to the environment. 

I've observed numerous bundles of MST which are particularly rusty, and stored externally on land that is open to all weather conditions. On occasion, I've observed these deposits (which I believe to be iron oxide) carry through the air. 

It may transpire to be a very minor issue which doesn't pose any risk to the environment, but I wanted to draw on the myriad of knowledge-bases within these forums.