What we cannot do
The versions of weather modification that the conspiracy theorists envision most often—significantly altering monsoons or hurricanes or making the skies clear and sunny for weeks at a time—have so far proved impossible to carry out. But that’s not necessarily for lack of trying.
The US government attempted to alter a hurricane in 1947 as part of a program dubbed Project Cirrus. In collaboration with GE, government scientists seeded clouds with pellets of dry ice, the idea…








