That's funny. The air near me is 80% nitrogen.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"Michael A. Terrell" wrote in
message
...


I'd think it would make sense to spray paint the air
pipe,
so it's different color than the other utilities. Water
is
blue, natural gas is yellow. Fire protection is red. So,
what's that leave?
Black???
Gerry :-)}
London, Canada
Green is still available - generally used for OXYGEN.


I don't know about Chicago, but the air here has about
21% Oxygen.


--
You can't have a sense of humor, if you have no sense.