Set fire to the ground and put a lot of smoke into the sky; Attack the clouds with artillery; Fly high in the clouds with a kite, then electrify the kite and flash flowers; Fly into the clouds and spray liquid water droplets and dust particles. However, the effects of these methods are not ideal. ?

It was not until 1946 that people discovered that millions of snow crystals could be formed by throwing tiny dry ice particles into the Leng Yun. On June 3, 65438, someone scattered dry ice particles on the top of the cumulus cloud with a temperature of -20℃ on the plane, and it was found that snow fell from this cloud.

Extended data:

theoretical basis

Artificial snowfall must first have clouds in the sky. There is no cloud, just like a clever woman can't cook without rice, and it won't snow. The cloud that can snow is the "Leng Yun" below 0℃. In the cold cloud, there are both small water droplets and small snow crystals condensed by water vapor. But they are all very small and light. If there are no conditions to continue to grow, they can only be suspended in the air like smoke, and it is difficult to fall.

You can often see large clouds in winter, but you can't see snowflakes floating down, because the snow crystals that make up these clouds are too small to overcome the buoyancy of the air and have poor precipitation ability. If some particles are sprayed in the cloud to promote the rapid growth of snow crystals to overcome the buoyancy of air and land, this is artificial snowfall.