Melting, laser cutting, heating, stressing, grinding, any time you are releasing any kind of particulate into the air, you should be taking precautions not to l

Melting, laser cutting, heating, stressing, grinding, any time you are releasing any kind of particulate into the air, you should be taking precautions not to let it end up in anyone's lungs. Even the stuff that doesn't cause cancer can still cause you physical harm. It takes very little effort to just be safe.