What is the truth about weather manipulation and chemtrail conspiracy theories, and how do they differ from actual scientific weather modification practices?

Weather manipulation exists in limited scientific forms like cloud seeding for drought relief, but the widespread chemtrail conspiracy theories lack scientific evidence. Harvard meteorologist Matthew Capucci explains that while countries like China do attempt small-scale weather modification, there's no proof of large-scale weather system manipulation as conspiracy theorists claim. The real danger lies in social media spreading misinformation that creates unwarranted fears. Scientific weather modification is transparent and localized, primarily used for agricultural benefits. The conspiracy theories often misunderstand normal atmospheric phenomena and aviation contrails, leading to unfounded suspicions about government weather control programs.