Is it possible to prevent unwanted weather phenomena?
Yes, but only to varying degrees of success. In China, hail causes tremendous damage to crops. The Chinese have developed a system by which they fire shots of chemicals at the hail storms. The resultant effect is that the hail droplets become rain droplets. The rain is far less damaging. This system is only practical, and value for money, in limited cases. Value for money has meant that other systems are not used. Oil burning can reduce fog, and this was done in the Second World War. However, a vast amount of oil is used, and so this is done very rarely. So, as yet, weather control is normally not worthwhile? Weather control is a young science and has only really been pursued in the last twenty years. It is likely that weather control will play a more important part as it becomes more feesible in the future.