COPENHAGEN -- A new paper published online Wednesday in the journal Nature suggests that the world may face a long-term sea-level rise of 20 to 30 feet, even under a modest global temperature rise.
The study -- by Princeton and Harvard researchers -- focuses on a period known as the last interglacial stage, which occurred about 125,000 years ago. At that time, temperatures at the two poles were likely warmer than today by five to nine degrees Fahrenheit, which is what scientists expect could happen again if the average global temperature warms four to six degrees above pre-industrial levels. ...
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