"Heavy Metal: Some Airborne Particles Pose More Dangers Than Others"
"Around the world, whenever airborne particles increase, so do deaths from heart and lung diseases. Now new evidence is emerging that some particles may be more dangerous than others. A growing body of research – much of it in New York City – suggests that breathing nickel and other metals may put acute stress on the lungs and heart, resulting in illnesses and deaths at particulate levels below national standards."Source: EHN, 12/17/2009