The collapse of the giant West Antarctica ice sheet is underway, two groups of scientists said Monday. They described the melting as an unstoppable event that will cause global sea levels to rise higher than projected earlier. Scientists said the rise in sea level, up to 12 feet, will take centuries to reach its peak and cannot be reversed. But they said a decrease in greenhouse gas emissions could slow the melt, while an increase could speed it slightly. Read more http://www.washingtonpost.com/natio...c26750-da00-11e3-b745-87d39690c5c0_story.html
