Durga Puja is also considered one of the world's largest open art festivals and the puja pandals come with creative themes and important societal themes. While the Jagat Mukherjee Park has created a replica of Kolkata's newest underwater Metro rail as it is a clean form of transport and talks about the dangers of river and plastic pollution, the Lalabagan Nabankur Puja pandal has created a pandal with 8000 saplings to send a message of tree plantation. Both these pujas with environment-conscious themes are drawing in huge crowds as the creative pursuits of the artists have resulted in beautiful pandals with powerful themes.