- Carbon Dioxide Levels Climb Into Uncharted Territory for Humans. The amount of carbon dioxide in the Earth's atmosphere has exceeded 402 parts per million (ppm) during the past two days of observations, which is higher than at any time in at least the past 800,000 years http://mashable.com/2014/04/08/carbon-dioxide-highest-levels-global-warming/ 3553 comments worldnews
- Carbon Dioxide Levels Climb Into Uncharted Territory for Humans. The amount of carbon dioxide in the Earth's atmosphere has exceeded 402 parts per million (ppm) during the past two days of observations, which is higher than at any time in at least the past 800,000 years http://mashable.com/2014/04/08/carbon-dioxide-highest-levels-global-warming/ 28 comments science
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