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Iran Begins Cloud Seeding To Induce Rain Amid Historic Drought (bbc.com) 36

Authorities in Iran have sprayed clouds with chemicals to induce rain, in an attempt to combat the country's worst drought in decades. From a report: Known as cloud-seeding, the process was conducted over the Urmia lake basin on Saturday, Iran's official news agency Irna reported. Urmia is Iran's largest lake, but has largely dried out leaving a vast salt bed. Further operations will be carried out in east and west Azerbaijan, the agency said.

Rainfall is at record lows and reservoirs are nearly empty. Last week President Masoud Pezeshkian warned that if there is not enough rainfall soon, Tehran's water supply could be rationed and people may be evacuated from the capital. Cloud seeding involves injecting chemical salts including silver or potassium iodide into clouds via aircraft or through generators on the ground. Water vapour can then condense more easily and turn into rain. The technique has been around for decades, and the UAE has used it in recent years to help address water shortages. Iran's meteorological organisation said rainfall had decreased by about 89% this year compared with the long-term average, Irna reported.

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Iran Begins Cloud Seeding To Induce Rain Amid Historic Drought

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  • how sick people turn to essential oils to solve their problems. Good luck.

    • Re:Kind of like (Score:5, Interesting)

      by caseih ( 160668 ) on Monday November 17, 2025 @02:47PM (#65801075)

      Not really. Cloud seeding happens in the US and Canada every year on a large scale. Usually it's done by insurance companies to reduce damages from hail storms by getting storms to rain out before hail can develop. And it does work but that is not always a good thing. In fact farmers in North Dakota have been calling for years for cloud seeding to be banned because what ends up happening is a big storm will come up but before it can advance across their farms, cloud seeding will cause it to all rain out in one area, rather than bring rain to a wider area. That's kind of the whole problem with weather modification. It does work but a net positive in one area might end up being a net negative over a wider area, or farther away.

      • What does it matter. The CIA will just step up their cloud seeding efforts to offset anything the Iranians try to do instead.

        I have no knowledge of any such plan by the CIA to use any kind of weather manipulation techniques to cause droughts in Iran, but you all have to admit that it sounds like exactly like the kind of thing they would do and based on what they've done to other countries historically is not outside the realm of possibility for them. I'd be more surprised if they weren't doing this as it
        • So the CIA doesn't really work anymore. After 70 years people have gotten wise to their tricks. There were multiple efforts to depose South American heads of state that were less than perfect for the CIA and American interests (and by American interests I mean American corporate interests, not your interests). Those attempts failed.

          That's why we're getting ready to go to war with Venezuela so we can take the oil and so Trump can distract from the Epstein files. In the old days we could easily depose a w
        • I know youâ(TM)re probably half joking, half serious. But you may be interested to know that Iran has accused Israel and UAE of stealing water via cloud seeding west of their territory.
      • Re:Kind of like (Score:4, Insightful)

        by wakeboarder ( 2695839 ) on Monday November 17, 2025 @03:22PM (#65801173)

        From Wikipedia:
        Despite decades of research and application, cloud seeding's effectiveness remains a subject of debate among scientists, with studies offering mixed results on its impact on precipitation enhancement, according to a report issued by the US Government Accountability Office in December 2024.[10] Whether cloud seeding is effective in producing a statistically significant increase in precipitation has been a matter of academic debate, with contrasting results depending on the study in question and contrasting opinion among experts.

        Which is pretty much where we are at with essential oils

        • Re:Kind of like (Score:4, Interesting)

          by thegarbz ( 1787294 ) on Monday November 17, 2025 @05:40PM (#65801479)

          That's not even remotely comparable. There's no academic debate about the efficacy of essential oils. There's wide spread agreement that they do fuck all. Since you like Wikipedia so much: "There is not sufficient evidence that it can effectively treat any condition.[3] Improper use of essential oils may cause harm including allergic reactions, inflammation and skin irritation. Children may be particularly susceptible to the toxic effects of improper use.[4][5] Essential oils can be poisonous if ingested or absorbed through the skin.[5]"

          Cloud seeding on the other hand has had mixed results. The problems with it is that it is unclear precisely on the conditions of it working, on how it works in different cloud types, and how it is best used. The problem is that many of the studies on it question whether it can produce rain from incredible dryness. It can't. It does however actively work in inducing rainfall from certain clouds in certain conditions.

          If you want the medical equivalent: I don't have a headache now, taking an aspirin will do nada for my head, that doesn't mean aspirin won't solve your headache, it may be able to, which in turn doesn't mean it will also fix a migraine induced headache, which it can't. Fortunately after years of aspirin's effectiveness being a subject of debate among scientists we do have a clear picture of what it can and can't do to your headache. Unlike essential oils which is settled science that it's "alternate therapy" (i.e. scam) for a reason, and unlike cloud seeding which is still actively debated.

  • by TheMiddleRoad ( 1153113 ) on Monday November 17, 2025 @03:10PM (#65801143)

    https://www.wsj.com/opinion/ha... [wsj.com]

    Use archive.is if you can't figure it out otherwise.

  • Desalination (Score:4, Interesting)

    by flyingfsck ( 986395 ) on Monday November 17, 2025 @04:10PM (#65801291)
    For the foreseeable future, there is enough water in the Caspian sea to desalinate. If they would just stop playing with nuclear centrifuges and build some pumps and pipelines instead.
    • by quenda ( 644621 )

      If they would just stop playing with nuclear centrifuges and build some pumps and pipelines instead.

      Iran's military spending isn't actually that much. Less than the US on a per-GDP basis even. Tiny compared to Saudi or Israel.
      The reason they are so impoverished is the Mullahs isolating them from the global economy.

  • I can't quite make out the labels on the greatest rainmaker of all time's chemical bottles: https://www.sandiego.gov/digital-archives-photos/rainmaker-charles-hatfield [sandiego.gov]
  • China has done this to stop the rain during the Olympics (2008). It works both ways - when you increase rain for yourself there will be less rain for whoever is downwind. for a short time Iran may have more rainfall but whoever is down wind will now also have a shortage.

    We worry about climate change but this could be the single most selfish and dangerous thing to do to our world climate out of desperation. Maybe in one-off events the Silver-Iodide or whatever is mostly harmless, but what happens if all t
    • It doesn't change climate, it's a local thing. A tiny change in weather isn't climate and this often doesn't make rain it's such a weak forcer. Been done off and on since the 1940s, old thing. And the AgI doesn't even dissolve in water so it's not bioavailable to any organisms, no salts!

      It is utterly harmless to living things.

  • Funny. I just read Why it's so hard to bust the weather control conspiracy theory [technologyreview.com]. Ignore the conspiracy theory part, it spends the first part of the article talking about cloud seeding, including what it can and cannot actually do.

    TL;DR: cloud seeding can change rainfall by a little bit, likely no more than 10%. It won't make a deluge unless the air was overflowing with moisture already. It's difficult to measure because forecasts aren't accurate enough to know what would have happened.

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