One of the two programs that monitor greenhouse gases said that it had revised a reading suggesting that carbon dioxide had surpassed the symbolic level of 400 parts per million. Read this article: National Briefing | Science: Crucial Carbon Dioxide Reading Revised Downward ; ;Related ArticlesWe Just Passed the Climate’s “Grim Milestone”Study Finds Loss of Rain Forests Can Deplete HydropowerDot Earth Blog: More on a Sensitive Climate Question ;

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National Briefing | Science: Crucial Carbon Dioxide Reading Revised Downward