It is REALLY very simple
http://bigbadbob.name/co2.jpg
Basic science. basic common sense. Believe what your eyes tell you.
--
(aka 'Bombastic Bob' in case you wondered)
'Feeling with my fingers, and thinking with my brain' - me
'your story is so touching, but it sounds just like a lie'
"Straighten up and fly right"
--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)