WHO: Diesel Exhaust Causes Lung Cancer
its always been an issue.
gasoline exhaust will kill you in minutes, while diesel exhaust MIGHT give you cancer.... i know which one i would rather sit in a non-vented room and breath for an hour.
Just think about all the lead that's being put in the air by old airplanes.
Or the lead that entered the atmosphere when they were dumping it on Chernobyl.
...and it's not like all the atomic bomb tests were good for the environment.
Park my GTI next to the TDI, and look at the exhaust tips. The TDI's are totally clean; the GTI's will be covered in soot.
Big issue is older heavy truck diesels, large ships that run on bunker oil, and in countries with a large number of older diesel vehicles without pollution controls.