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How Cloud Seeding Works

Context:

As Delhi grapples with severe air pollution, the concept of cloud seeding has emerged as a potential short-term solution to combat the hazardous air quality.

Relevance:

Facts for Prelims

Cloud Seeding

Cloud seeding, or artificial rain, is a method used in weather modification that aims to enhance precipitation. This technique involves introducing substances into clouds to stimulate the formation of rain or snow.

How Cloud Seeding Works
  • Substances Used: Common materials used for cloud seeding include silver iodide, potassium iodide, and dry ice.
  • Method of Dispersion: These substances are dispersed into clouds using aircraft, ground generators, or rockets. The chosen method depends on the specific requirements and geographical conditions of the area.
  • Process: The dispersed particles act as nuclei around which water droplets can form. These droplets then grow in size until they are heavy enough to fall as precipitation, potentially increasing the amount of rainfall.
Applications in Pollution Control
  • Air Quality Improvement: In areas plagued by air pollution, cloud seeding is considered as a method to wash away particulate matter and other pollutants. By increasing rainfall, it is hoped that dust and airborne particles will settle, leading to temporary improvements in air quality.
Challenges and Considerations
  • Atmospheric Conditions: Effective cloud seeding requires specific atmospheric conditions, particularly clouds that contain enough moisture to support precipitation.
  • Efficacy: The success of cloud seeding can vary greatly depending on environmental conditions and the techniques used, making it an unpredictable intervention.
  • Environmental Impact: While cloud seeding can increase precipitation in targeted areas, it also raises concerns about the potential long-term impacts on natural weather patterns and ecosystems.

-Source: India Today


 

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