'Dokhmenashini' is a 3000 year old funeral tradition of the Parsi community. According to this, the dead bodies of Parsi people are kept in 'Dakhma', also known as 'Tower of Silence', for the last rites.
The 'Tower of Silence' is a circular structure, located away from the habitated area. The carcass is placed on its top, where it is consumed by vultures in form of their food and the bones gradually decompose on their own.
Parsis believe in 'Ahura Mazda Ishwar'. Elements like earth, water and fire are considered very sacred in this religion. They believe that burning the dead body leads to firegetting polluted while burial to leads to earth getting polluted and water is polluted by flowing the dead body in the river.
Due to changes over time and the decline in the number of vultures, it has become difficult for the Parsi community to maintain this tradition and they have been forced to adopt the new system. Under the new system, the Bombay Parsi Panchayat has started using solar panels in 'Dakhma', which gradually ends up burning the dead body.