Press Trust of India: Scientists from major countries including India have come out with a declaration demanding a region-by-region response to increased water scarcity and heightened hazards. An international group of scientists from the US, India, China and Britain, in a declaration, have said that melting glaciers, weakening monsoon rains, less mountain snowpack and other effects of a warmer climate will lead to significant disruptions in the supply of water to highly populated regions of the …