How cloud seeding can help alleviate drought

States and utility companies are investing in "cloud seeding" — a way to artificially increase precipitation in the drought-ridden American West and worldwide. By seeding storm clouds with a substance called silver iodide, it's possible to increase the efficiency of storms by 5% to15%. It's no cure for drought, but it can be a valuable water management tool. As winter gets underway, cloud seeding operations are ramping up across the country.