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Swiss Researchers Try to Make it Rain With Lasers
formaggio writes "Last year a team of researchers at Switzerland's University of Geneva had come up with an interesting way of making it rain– by shooting lasers high up into the sky. At the time it seemed like science fiction, but now they are one step closer after the team successfully finished tests around Lake Geneva. From the article: 'Records from 133 hours of firings revealed that intense pulses of laser light created nitric acid particles in the air that behaved like atmospheric glue, binding water molecules together into droplets and preventing them from re-evaporating. Within seconds, these grew into stable drops a few thousandths of a millimeter in diameter: too small to fall as rain, but large enough to encourage the scientists to press on with the work.'"
As long as you aren't doing it in any flight paths, you are probably not going to cause any immediate damage...
The real giggles, with the eventual success of any of these cloud-seeding projects, will be political(probably with a side of Aral-sea style ecological fuck-uppery in places where people don't care very much):
As with rivers that flow across political boundaries(a source of endless contention over water rights, complaints by team downstream that team upstream is taking too much water out and/or dumping too much shit in, etc.), air currents carrying enough water vapor to be even theoretically 'seed-able' are a finite resource. Rain that falls in one location won't be available to fall in another one. Historically, there hasn't been all that much fighting(either the legal flavor, or the literal flavor) about it, because rainfall was pretty much just a function of geography, climate, and luck.
Should it become possible to 'pump' a cloud with some comparatively inexpensive apparatus(whether it be this laser widget or some other thing), reliable air currents flowing from regions of evaporation will become a new flavor of 'river', suddenly subject to rivalrous use, and the rivalries that stem from it. Happy times!