SciDev.net: Many of the developing world’s largest rivers are drying up because of climate change, threatening water supplies in some of the most populous places on Earth, say scientists. Researchers from the U.S. National Centre for Atmospheric Research (NCAR) in Boulder, Colorado, analysed data combined with computer models to assess flow in 925 rivers – nearly three quarters of the world’s running water supply – between 1948 and 2004. A third of these had registered a change in flow and …