A
Uh-huh.
B
-- that's, uh, those are carbon particles, and carbon dioxide and water vapor, uh, because when you, when diesel is burned it's it, you know diesel fuel is burned in a, in the diesel engine it's burned so completely, that you don't have any, uh, nitrous oxides, uh, or oxides of nitrogen, uh, to, uh, form --
A
Oh.
B
-- because of, by virtue of the very combustion process of the diesel engine, because diesel oil is, uh, is not very volatile.
A
Uh-huh.
B
You know, where gasoline, if you leave a little pail of gasoline out before long it's gone.