questions about jet exhaust and emissions

From:         "Brett Borowski" <brett@surfpix.Princeton.EDU>
Date:         29 Nov 93 22:21:41 PST
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I've got some questions about jet exhaust and emissions.  These are only
curiosity questions but any answers (or directions to answers) will be much
appreciated. 

1)  What comes out the aft end of a typical (airliner) jet engine?
    (ie H2O, CO2, CO, hydrocarbons, etc, etc.)
2)  Are there any regulations regarding such emissions?
3)  How does that amount of emissions compare on a seat-mile basis to
    current automobile emmissions? (Roughly, based on a 199x car.)

Thanks,
Brett
brett@surfpix.princeton.edu                              Brett Borowski