Long-term diesel fume exposures have been associated with not only increased rates of lung cancer but with other forms of cancers and lung diseases in railroad workers. The fine particles in diesel fumes include many known carcinogens, such as benzene and carbon monoxide, and most people in the US are not exposed to a fraction of diesel fumes that engineers, conductors and car repair railroad workers have been exposed to for decades. COPD is now a known condition that can be caused by diesel fumes inhaled over long time periods, along with what is called diesel asthma by some doctors. These diseases as well as increased lung cancers are now known to be highly associated with diesel fume long term exposures. As early as 1955, a railroad attorney was giving a lecture to the nation’s claims agents about the characteristics of diesel fumes, and the potential carcinogens as can be seen in the graphics.