???In conclusion, it seems that the depletion of atmospheric oxygen will continue until such time as we stop burning hydrocarbons faster than the environment can absorb the byproducts of the reaction and replenish the oxygen.??? <a href="http://blogcritics.org/scitech/article/atmospheric-oxygen-levels-fall-as-carbon/">http://blogcritics.org/scitech/article/atmospheric-oxygen-levels-fall-as-carbon/</a> Another article concludes the oxygen decline was considerable over the past 100 years.