What's cloud seeding, artificial rain induced when AQI is high
The Delhi government has proposed cloud seeding, a weather modification technique, to tackle the severe air pollution in the National Capital Region (NCR). Environment Minister Gopal Rai urged the central government to approve this emergency measure as Delhi's Air Quality Index (AQI) reached the "severe plus" category. He accused the central government of ignoring repeated requests for an emergency meeting to discuss this proposal since August.
Cloud seeding plan and costs
Cloud seeding involves releasing chemicals like silver iodide into the atmosphere to induce rain, washing away pollutants. The proposed cloud seeding plan would initially cover 300 square kilometers at a cost of ₹3 crore. If successful, a second phase could extend coverage to 1,000 square kilometers for an additional ₹10 crore. However, experts have expressed skepticism about its effectiveness and environmental impact.
Delhi's anti-pollution measures and calls for artificial rain
Despite shutting schools and halting construction activities, Delhi continues to battle high pollution levels. The city is currently under Stage IV restrictions of the Graded Response Action Plan (GRAP), including limiting vehicular and industrial emissions. The persistent high pollution levels have prompted calls for innovative solutions like artificial rain. Rai stressed that "artificial rain is a need of the hour" and called for immediate action from the central government.
Cloud seeding's global use and Delhi's pollution strategy
Cloud seeding has been employed in areas such as Lahore, Pakistan, where it provided a temporary respite in air quality last year. However, scientists caution that not all clouds are ideal for seeding, and further research is required to prove its effectiveness. Scientists and experts have called the artificial rain proposal "impractical," saying its effectiveness is not guaranteed.
Expert skepticism over cloud seeding's effectiveness
Mukesh Khare, an air pollution expert from IIT Delhi, said more research is required before considering this solution to Delhi's winter pollution problem. "Until we have enough data or research to prove its effectiveness, this could be a waste of funds. Additionally, the environmental impact of silver iodide needs to be studied," he added.
