India’s cloud seeding trials ‘costly spectacle’
India’s efforts to combat air pollution by using cloud seeding in its sprawling capital New Delhi appear to have fallen flat, with scientists and activists questioning the effectiveness of the move. Cloud seeding involves spraying particles such as silver iodide and salt into clouds from aircraft to trigger rain, that can wash pollutants from the air. Delhi authorities, working with the Indian Institute of Technology (IIT) Kanpur, began trials last week using a Cessna aircraft over parts of the city. But officials said the first trials produced very little rainfall because of thin cloud cover. “This will never ever do the job, it’s an illusion,” said Mr Bhavreen Kandhari, an environmental campaigner in Delhi. “Only when we clean up sources of air pollution can we control it.” The government has spent around US$364,000 (S$473,753) on the trials, according to local media reports. Dr Mohan George, from the Delhi-based Centre for Science and Environment, said artificial rain was not the answer. “The levels of pollution will come back almost immediately as rain stops,” the scientist told AFP. When it does work, it will increase precipitation in one area – while potentially decreasing it for another.
