Transcript
Jessica Mendoza (0:05)
Did you know that it's possible to artificially create rain? I didn't, but the technology has actually been around for decades. It's called cloud seeding.
Chris Marr (0:17)
Cloud seeding was invented in 1946 by General Electric scientists in upstate New York. And what they were trying to do was to find a solution to the icing on airplane wings.
Jessica Mendoza (0:30)
That's our colleague Chris Marr.
Chris Marr (0:32)
And they discovered that when they put dry ice into clouds in a simulated experiment, it produced ice crystals like snow. So it really was a way to squeeze more water, more moisture out of clouds than would traditionally be falling naturally.
Jessica Mendoza (0:48)
Typically, the way it works is an airplane flies into a bunch of clouds and releases a type of salt called silver iodide, the water particles attached to the tiny bit of salt and, and form rain or snow.
Chris Marr (1:00)
What I discovered in kind of looking back through the history of the cloud seeding was that in the 70s, that was kind of considered the heyday. It was used much more commonly, but the usage fell off.
Jessica Mendoza (1:11)
That's because it was hard to measure how well cloud seeding was working. The technology still had a ways to go, and it also seemed a little unnatural to some people.
Chris Marr (1:21)
It does have that sort of mysterious element to it that you can affect, you know, natural weather systems, things in nature. Also, people have questions about whether people should interfere with nature, you know, whether we should try to influence it or to what degree.
Jessica Mendoza (1:38)
Today, thanks to new technology, cloud seeding has seen somewhat of a comeback, especially in states where droughts have gotten dramatically worse.
Chris Marr (1:47)
States like Utah, Nevada, California, Western states that are tend to be dry. They've had a lot of droughts in the past few decades.
Jessica Mendoza (1:55)
There's hope that cloud seeding can help solve the massive water crisis out west. Except the misgivings about the technology won't go away. And now cloud seeding is caught up in full blown conspiracy theories.
Chris Marr (2:08)
