From inside climate news –Across hundreds of mountaintops, from the Sierra Nevada to the Sawtooths, Wasatch and Colorado Front Range, cloud seeding experts are now often burning small amounts of silver iodide with the aim of bolstering dwindling water supplies. The vaporized metal particles are ideal kernels for new ice crystals. When moist, super-cooled air rises over mountain ranges under predictable winds, it sets up perfect conditions for the crystalline alchemy that creates snow, the white gold craved by ski resorts, ranchers and farmers and even distant cities that need mountain water to survive. The scramble for water has intensified as global warming has battered much of the West during the last 20 years with heat waves, droughts and wildfires. With projections for declining snowpack and river flows, cloud seeding is becoming a regional climate adaptation measure costing several million dollars each year. In other regions, including parts of the central United States, seeding has also been used to try and enhance summer rains and to reduce the risk of severe hail storms.  (more)