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Cloud seeding is a scientific method that artificially changes a cloud's structure in order to increase chances of precipitation. In this method, particles of dry ice (silver iodide) are added to the clouds-either from above, with the help of aeroplanes; or from below, using cannons. Water vapour present in the clouds condenses around these particles of dry ice and precipitation occurs. 1. What is cloud seeding? 2. What is the material around which water vapour in the clouds condense in this method? How is it introduced in the clouds? 3. Think and write of one advantage and one possible disadvantage of cloud seeding.​