global warming question [View All]

[jbm]

My sister is a high school teacher and she was asked a question for which she has been unable to find a definitive answer. If Carbon dioxide levels are increasing, are there any studies available to show that oxygen levels are decreasing? If more and more oxygen is being bound to carbon in the formation of excess carbon dioxide, it would seem that oxygen would be decreasing unless some other reaction is taking place which is replacing the oxygen bound in the CO2.

My sister suspects that her student is being used by a "global warming doubter" who also teachs at her school. The other teacher was very negative when my sister showed An Inconvenient Truth to her classes.