Carbon Dioxide Level Passes Long-Feared Milestone

[unable to retrieve full-text content]The amount of the gas in the air has not been this high for at least three million years, and scientists believe the rise portends large changes in the climate and sea level.

Source: http://www.nytimes.com/2013/05/11/science/earth/carbon-dioxide-level-passes-long-feared-milestone.html?partner=rss&emc=rss

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