SciDev.Net: New evidence that Himalayan glaciers are shrinking has added weight to concerns that there could be severe water shortages in the region by 2030. Researchers drilling an ice core in the 6,050 metre-high Naimona’nyi glacier near Tibet were expecting to find radioactivity left by atomic tests carried out 50 years ago. Instead they found little more than background levels of radioactivity. The scientists, from the Institute for Tibetan Plateau Research, the Chinese Academy of …