Cloud Seeding: A Possible Short-Term Solution to Delhi's Air Pollution Crisis
Delhi's government is exploring cloud seeding as a short-term solution to the city’s severe air pollution. While the technique could reduce pollutants temporarily, experts caution that it won't address the root causes of pollution. Explore how cloud seeding could help Delhi.
As Delhi battles one of its worst air quality crises, the Delhi government is looking at innovative solutions to combat the hazardous pollution. With the Air Quality Index (AQI) regularly in the "severe plus" category, surpassing 450, one potential short-term fix that has gained attention is cloud seeding, also known as artificial rain. Delhi's Environment Minister, Gopal Rai, has urged Prime Minister Narendra Modi to support the use of cloud seeding as a means to temporarily alleviate the city's air pollution problem.
What is Cloud Seeding?
Cloud seeding is a weather modification technique aimed at increasing precipitation. This process involves introducing substances like silver iodide, potassium iodide, or dry ice into clouds to act as nuclei, helping water droplets form and enhance rainfall. The idea is that increased rainfall can help "wash away" pollutants from the atmosphere, including particulate matter, dust, and other harmful contaminants.
In Delhi, where pollution levels have remained critically high, cloud seeding could potentially offer relief by reducing the concentration of these pollutants in the air. The Indian Institute of Technology (IIT) Kanpur has suggested a cloud seeding project with an estimated cost of Rs 1 lakh per square kilometre.
Is Cloud Seeding Effective?
While cloud seeding has shown some success in enhancing rainfall in certain regions, its effectiveness in improving air quality is still debated. Although cloud seeding can reduce particulate matter temporarily, it does not address the underlying causes of pollution, such as industrial emissions, vehicle exhaust, and construction dust. Experts emphasize that cloud seeding should not be viewed as a permanent solution to Delhi's air quality problems. Its success heavily depends on the presence of suitable atmospheric conditions, such as clouds with enough moisture.