Are there any dangers in artificial rainfall?

No harm.

Generally speaking, the colloid state of water vapor in clouds is relatively stable and it is difficult to produce precipitation. Artificial rainfall enhancement is to destroy this colloid stable state. The usual artificial rainfall is to use certain means to spread catalyst (silver iodide) in the medium and low cloud systems with relatively large cloud thickness to achieve the purpose of rainfall.

Silver iodide can increase the number of condensation nuclei in the cloud, which is beneficial to the collision and increase of water vapor particles; secondly, it changes the temperature in the cloud, which is beneficial to disturbance and generation of convection. The disturbance and convection in the clouds will be more conducive to the collision and increase of water vapor. When the updraft in the air cannot withstand the floating of water vapor particles, rainfall will occur.

The water droplets in the cumulonimbus clouds become larger and fall down. Anti-aircraft artillery artificial rainfall is to shoot the shells containing silver iodide into the altitude of 4000 to 5000 meters where there are a large number of cumulonimbus clouds. The silver iodide diffuses at high altitude and becomes The condensed core of water droplets in the cloud. The water droplets quickly condense around it and reach a certain volume before falling. When silver iodide is transported to high altitudes by cannonballs, it will spread into small particles that are difficult to distinguish with the naked eye. ?

After the artillery shell explodes at high altitude, it will turn into less than 30 grams, or even only two or three grams of debris and fall to the ground. The area where it falls is the no-man's land that has been tested and calculated before. Will not cause harm to human body.