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Continue to ChatIt's official: Global carbon levels surpassed 400 ppm for entire month http://nasheman.in/its-official-global-carbon-levels-surpassed-400-ppm-for-entire-month/
It's official: Global carbon levels surpassed 400 ppm for entire month http://nasheman.in/its-official-global-carbon-levels-surpassed-400-ppm-for-entire-month/