海角大神

Cloud seeding involves spraying particles, such as salt-based compounds and silver iodide crystals, into moisture-heavy clouds to provoke rain. Tuesday鈥檚 trial was conducted in collaboration with the Indian Institute of Technology Kanpur to clean pollution from the air. Home to more than 30 million people, New Delhi is the most polluted capital city in the world, though experts say the only cure for pollution is curbing it at the source.