Hourly Weather - Camberley, United Kingdom

About 800 million people rely on seasonal runoff from glaciers studied in a 1,200-mile span like this one in the Everest region about 85 miles northeast of Kathmandu. (Prakash MathemaAFP/Getty Images) At a Glance The glaciers lose an average of 8 billion tons of water each year.The average rate of melting has doubled since 2000.The study used declassified photos from spy satellites taken between 1975 and 2000. The melting of Himalayan glaciers caused by rising temperatures has doubled since the...