Why in News? 

Delhi is set to implement artificial rain through cloud seeding for the first time from July 4–11 to combat air pollution.  

Artificial Rain: An Overview 

• Artificial rain involves cloud seeding, a weather modification technique used to induce rainfall. 
• It is mainly used to increase precipitation, fight drought, and reduce air pollution. 
• Indian Institute of Technology, Kanpur, has been assigned to implement the project. 

How Cloud Seeding Works 

• Chemicals like silver iodide, potassium iodide and dry ice are released into clouds via aircraft or helicopters. 
• These substances act as nuclei, allowing water vapor to condense into droplets large enough to fall as rain. 
• Success depends on adequate moisture and favorable atmospheric conditions.