Greenhouse gases 28 percent higher than any time in the last 800,000 years
Nature News: Greenhouse-gas concentrations are higher today than they have been at any point in hundreds of millennia, according to researchers who have analysed tiny air bubbles trapped in Antarctic ice that dates back 800,000 years.
Atmospheric levels of carbon dioxide are now more than 28% higher than at any other point in the time period covered by the samples, according to Thomas Stocker, one of the authors of two studies in this week's Nature.
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