From the the European Project for Ice Coring in Antarctica
By Alex Morales
May 14 (Bloomberg) -- Ancient air bubbles trapped in Antarctica's ice have revealed that levels of carbon dioxide and methane in the Earth's atmosphere are at their highest in 800,000 years, two studies in the journal Nature said.
Analysis of a 3.3-kilometer (2.1-mile) ice core extended the existing record of atmospheric greenhouse gases by 150,000 years and showed that concentrations of CO2 and methane fluctuated within bands well below today's levels, Thomas Stocker, a co- author of both papers, said in a phone interview.
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