On Thu, 21 Jun 2007 15:48:12 -0700, Gordon wrote:

If you have to wear an oxygen mask at high altitudes because oxygen
(32) is heavier than other gases that make up our air (28), then how
does co2 get into the stratosphere and cause a warming blanket when co2
(44) is much heavier than oxygen?
Gordon

If white is black, what color is newsprint?
That was a similar question.

Atmospheric gases stay remarkably well mixed.
But the higher you go, the lower the pressure
(of all components - including oxygen)

Brian Whatcott Altus OK