The document discusses Ganesh Visarjan, the ritual immersion of Ganesh idols. It notes that while meant to celebrate Ganesh Chaturthi, the immersion pollutes water sources. Idols are made of materials like plaster of Paris, clay, and paints containing heavy metals. When immersed, these dissolve slowly, increasing water's chemical and organic content beyond permissible standards and poisoning it. This damages ecosystems by killing fish and plants. Ingesting contaminated water leads to health issues. The document recommends using eco-friendly idols that dissolve within 10 hours or permanent idols to reduce pollution from the tradition.