Nerds make it rain in Nevada. The Las Vegas strip? No, cloud-seeding drones over the desert

Big plans ahead if the FAA gets its act together

Cloud seeding - spraying chemicals into the air to encourage rainfall - used to be regarded as a fringe science at best, but now it's kinda of big deal. As such, eggheads in Nevada hope to use drones to turn parts of the largely arid US state, otherwise famous for the Las Vegas adult playground, green."