Kolkata, Kolkata Metro has launched an awareness campaign to keep stations clean and plastic free. An official provided this information on Wednesday.

He said, it has been observed that a section of passengers are littering the metro premises, due to which this campaign has been launched.

"Making the Metro plastic-free is not easy and the responsibility lies not only with the authority but also with the passengers," the official said.

He said the Metro is encouraging the use of cheap reusable bags and ensuring eco-friendly disposal at stations.

He said that Kolkata Metro employees and security personnel are involved in the operation.