It is impossible to manufacture rain, which depends on water vapour in the atmosphere. This is supplied by heat and evaporation from the Earth’s surface. Only when moist air cools and condenses into clouds is there potential for rain. Techniques such as cloud seeding cannot create this water; they can only encourage raindrops to form in clouds that are already primed to produce rain.
Despite frequent claims, there is no credible evidence that large-scale geoengineering programs or “chemtrails”, are secretly operating. In contrast, solar radiation management (SRM) and cloud seeding are research-stage or localized weather-modification activities: SRM has not been deployed at scale while cloud seeding is limited to regional precipitation enhancement. Both are publicly documented, regulated and small in scope.