MUMBAI: Several NGOs like Mangrove Society of India (Maharashtra Chapter) along with Vanashakti, Maharashtra Nature Park and various local bodies will organize nature walks and cleanup of inorganic waste from mangroves on Sunday, in order to celebrate World Wetlands Day, which falls on February 2. The purpose of the walks is to expose the participants to the beauty of some of the wetland areas in the city and the dangers being faced by them.