Varshadhari project is cloud seeding project of Karnataka Government under which an aircraft will spray chemicals to induce rainfall. Cloud seeding uses either silver iodide, potassium iodide or dry ice particles to cause rainfall from clouds.

Cloud seeding (also known as weather modification technique) is an artificial way to induce moisture in the clouds so as to cause a rainfall.

• In this process, either silver iodide, potassium iodide or dry ice (solid carbon dioxide) are spread onto the clouds causing rainfall. These iodide particles rise into the clouds, cause moisture to freeze.
• These particles act as a base for water vapours to settle on that later crystallises and falls as rain or snow.