Archive · 4 Nov 2025
Delhi Cloud Seeding Experiment Fails to Clear Air Pollution
Imagine clouds are like sponges that can hold water.
Normally, when the water in the sponge gets heavy enough, it falls as rain.
Cloud seeding is like squeezing the sponge by adding special tiny particles, like salt, to help the water droplets inside the cloud get heavier faster so they fall as rain.
The government in Delhi tried this to wash away air pollution.
However, the clouds in Delhi didn't have enough water vapor, or 'wetness,' for the special particles to work effectively.
It's like trying to squeeze a dry sponge – not much water comes out.
So, the experiment didn't bring much rain and therefore didn't clear the pollution for long.
Experts say this is only a temporary fix and doesn't solve the main problem of why the air is dirty in the first place.
Delhi government collaborated with IIT-Kanpur for a cloud seeding experiment on October 28 to tackle air pollution.
Cloud seeding involves using chemicals like silver iodide to induce artificial rainfall when natural conditions are insufficient.
The experiment failed because the targeted clouds had only 15-20% humidity, far below the required 50% for successful cloud seeding.
While cloud seeding has been successful in countries like the UAE and China for increasing rainfall or managing weather, it's not a permanent solution for air pollution.
Scientists emphasize that cloud seeding offers only temporary relief and does not address the root causes of air pollution, necessitating long-term strategies.
- Who
- Delhi Government and IIT-Kanpur
- What
- Conducted a cloud seeding experiment to combat air pollution
- When
- October 28
- Where
- Delhi
- Why
- To provide relief from severe air pollution
- Cloud Seeding Process
- Artificially inducing rainfall by using chemicals like silver iodide, dry ice, or salt as condensation nuclei.
- Delhi Experiment Date
- October 28
- Partners
- Delhi Government and IIT-Kanpur
- Chemicals Used
- Common salt, rock salt, and silver iodide
- Humidity Requirement
- Around 50% or more for successful cloud seeding
- Delhi Experiment Humidity
- 15-20%
- Successful Examples
- UAE (increased rainfall by 10-30%), China (2008 Beijing Olympics weather modification)