By Emel Oz Gozellik </p> <p>ANKARA (AA) – Melting Greenland ice sheets may raise sea levels as much as an eye-popping seven meters (23 feet), endangering coastal cities like New York, Lagos, and Shanghai, according to a new study. </p> <p>Researchers at the Woods Hole Oceanographic Institution in Falmouth, Massachusetts found that glaciers on the world’s second-largest island are melting more than 30 percent faster than during the mid-1900s. </p> <p>Today, these rates are "off the charts," said glaciologist Sarah Das, who is a co-author of the study, published this week in the journal Nature. </p> <p>As they are located near coasts, the study’s findings imply that eight of the world’s 10 largest cities will be hard hit by the sea rise.