I believe a prize for weather control, may be a sci fi, would have a great deal of benefits, to tackle climate change as cloud seeding is being used in South Asia for irrigation. It could be used to help clean air and deliver water. Airhes has shown in principle that clean energy could be generated from clouds. Wildfire could be prevented or tackled using rainfall. Flooding could be ameliorated by redirecting rainfall. Also irrigation could help feed the next billion. If it's cheap enough very crude weather control could deliver huge benefit.