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O2 levels in lower atmosphere

  1. Dec 9, 2008 #1
    Are O2 levels dropping in our atmosphere? I read something a while ago that mentioned allergies are getting worse due to increasing CO2 levels in atmosphere, so I'm guessing O2 levels are dropping as well. I was in the mountains a week ago (out of a valley), and noticed how easier it is to breath probably due to increased O2 concentrations. But the difference between breathing valley air, and mountain air seems to be getting bigger.
  2. jcsd
  3. Dec 9, 2008 #2


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    CO2 has 'only' gone up by 100ppm (0.01%) so even if it did you would have a job detecting a change of 0.01% in the amount of oxygen.
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