In climate change news, sixty-five world leaders have announced they will attend next month’s climate summit in Copenhagen. But leaders from the world’s top three carbon polluters — the United States, China and India — have not said yet if they will attend the meeting. Meanwhile, a new study by NASA has determined that about 57 billion tons of ice is melting annually in the East Antarctic ice sheets. The study raises new fears that global sea levels might rise faster than scientists had projected. Until now, scientists only thought ice was melting on the much smaller West Antarctic ice sheet. If the entire East Antarctic sheet melted, it could raise world sea levels by about fifty to sixty meters.