What is cloud seeding and how does it work?

Cloud seeding is a technique that involves adding particles like silver iodide or chemical solutions to clouds to promote the condensation of water vapor and enhance rainfall. The particles act as "seeds" around which water droplets can form and grow, leading to increased precipitation.

How effective is cloud seeding in addressing air pollution in Delhi?

The effectiveness of cloud seeding in addressing air pollution in Delhi is still being evaluated. Past experiments conducted by the Indian Institute of Tropical Meteorology (IITM) in the 1970s suggested a 17% increase in rainfall, but the long-term efficacy of the technique remains uncertain.

What are the potential environmental concerns with cloud seeding?

The seeding agents used in cloud seeding, such as silver iodide and dry ice, can pose environmental hazards. The residual silver from silver iodide is considered toxic, and dry ice can contribute to greenhouse gas emissions. Researchers emphasize the need for proper precautions and monitoring when conducting cloud-seeding trials.

Home / Weather / Cloud Seeding Trials Seek to Boost Rainfall and Curb Delhi's Air Pollution

Cloud Seeding Trials Seek to Boost Rainfall and Curb Delhi's Air Pollution

28 Oct

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Summary

Delhi conducts first cloud-seeding trial to address air pollution
Particles like silver iodide added to clouds to promote rainfall
Experiments show potential 17% increase in rainfall, but long-term efficacy unclear

Cloud Seeding Trials Seek to Boost Rainfall and Curb Delhi's Air Pollution

In October 2025, Delhi conducted its first cloud-seeding trial, an experimental technique aimed at increasing rainfall and addressing the city's persistent air pollution issues. The process involves adding particles like silver iodide or chemical solutions to clouds, which act as "seeds" and promote the condensation of water vapor, leading to enhanced precipitation.

According to a report by researchers from the Indian Institute of Tropical Meteorology (IITM), Pune, cloud seeding has been explored for decades, with early experiments dating back to the 1940s. In cold clouds, where temperatures are below freezing, silver iodide particles are used, while in warmer clouds, chemical solutions like sodium chloride or potassium chloride are employed.