http://virginiabeach.injuryboard.com/mass-transit-accidents/Long-Term-Railroad-Worker-Diesel-Exhaust-Fume-Exposure-Linked-to-Asthma-Lung-Disease-and-Cancers-Part-2-of-Two-Reports.aspx?googleid=233516

"There is a growing body of evidence that long-term railroad worker exposure
to diesel exhaust fumes can lead to a condition called "diesel asthma" a
form of COPD, and additional evidence shows an increased incidence of lung
cancer rates among such railroad workers/employees."

You diesel motor boaters are asking for it. Get a clue.

Wilbur Hubbard