Колку што знам во цел свет се укинува градобијната одбрана бидејќи новите истражувања покажаа дека на тој начин не е можно да се одбраниме од градот.
Suppression and prevention
During the
Middle Ages, people in Europe used to ring church bells and fire
cannons to try to prevent hail, and the subsequent damage to crops. Updated versions of this approach are available as modern
hail cannons.
Cloud seeding after
World War II was done to eliminate the hail threat,
[9] particularly across
Russia - where it was claimed a 50 to 80 percent reduction in crop damage from hail storms was achieved by deploying
silver iodide in clouds using
rockets and
artillery shells. Their results have not been able to be verified. Hail suppression programs have been undertaken by 15 countries between 1965 and 2005.
[18] To this day, no hail prevention method has been proven to work.
[9]
Целосно прочитајте
http://en.wikipedia.org/wiki/Hail