A.According to rituals and Indian custom, the idol of Lord Ganesha can be kept for 1.5 days or for 3 days or for 7 days or for all the 10 days of Ganesh Chaturthi. After the Ganesh festival is over, the idol is immersed in water. But many methods are listed above to conduct an environmentally conscious immersion ritual without compromising at all on the ritual significance of the process.