Global Carbon Dioxide Levels

Sometime in the next month, it is expected to record a daily concentration of carbon dioxide in the atmosphere of more than 400 parts per million (p.p.m.), a value not reached at this key surveillance point for a few million years (Nature News April 30, 2013)


  1. Blerg. That's about all I have to say about that. I am not an optimist on the climate change front.


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