There’s two kinds of “work” here. One is to induce rain that would not have otherwise occurred, and the other is to induce rain that would have naturally occurred a few minutes or a few kilometers away. Call it “making” versus “moving” rain. A cursory examination of Wikipedia suggests the recent claimed successes have been at moving rather than making rain. And the failures at finding any effects have been at making rather than moving. And of course it would be far more useful to make rain than to move it.
There’s two kinds of “work” here. One is to induce rain that would not have otherwise occurred, and the other is to induce rain that would have naturally occurred a few minutes or a few kilometers away. Call it “making” versus “moving” rain. A cursory examination of Wikipedia suggests the recent claimed successes have been at moving rather than making rain. And the failures at finding any effects have been at making rather than moving. And of course it would be far more useful to make rain than to move it.