Glaciers are losing ice at an accelerating rate, threatening global sea levels and freshwater supplies. A massive international effort has tracked this loss over two decades, revealing that glaciers lost 273 billion tonnes of ice per year on average,

Climate change is accelerating the melting of the world's mountain glaciers, according to a massive new study that found them shrinking more than twice as fast as in the early 2000s. The world's glaciers lost ice at the rate of about 255 billion tons (231 billion metric tons) annual from 2000 to 2011,