 After the decision to extend Salt Lake City by converting more wetlands in the area, a Public Interest Litigation (PIL) by CSOs saved the Wetlands by a landmark judgment of Justice Umesh Chandra Banerjee of Calcutta High Court.The East Calcutta Wetlands were designated a "wetland of international importance" under the Ramsar Convention on 19 August 2002.There are about 100 plant species, which have been recorded in and around the East Calcutta Wetlands.