The coast of Odisha is periodically battered by
cyclones, which cause tidal surges that may cause devastating floods. In the past, the coast was protected by a 5 km belt of
mangroves, but the belt has shrunk due to developments such as dams on the rivers that supply fresh water to the trees. An unusually violent cyclone in 1999 created tidal surges 7 meters high that swept inland, killing 10,000 people and causing property damage that affected several million inhabitant of the coastal strip. There is a concern that the deepwater port will further damage the mangroves, including those at the nearby
Bhitarkanika Mangroves conservation area. In May 2010 a non-partisan group of 20 politicians began lobbying to halt construction, which they claimed was in violation of the Forest Conservation Act of 1980. The planned port is located just north of the Gahirmatha Marine Sanctuary, where from 200,000 to 500,000 female olive ridley turtles nest every year. Although the port site is not a nesting area, environmentalists are concerned that dredging and industrial pollution will disrupt the environment and the natural food chain. In July 2007,
Greenpeace activists staged a rally in front of Bombay House, headquarters of the
TATA Group, demanding a halt to construction of the port which they claimed would harm the turtles. The DPCL has rejected concerns about the impact. They state that all environmental clearances were obtained correctly, that the main breeding grounds for the turtles are well to the south, and that the shipping lanes will not cut across turtle migration routes. TATA & Sons filed a suit against Greenpeace in the Delhi High Court, claiming a "Turtle vs TATA" game on their website constituted defamation and trademark infringement. The
Cyclone Yaas made a landfall in
Balasore,
Odisha near the port, which resulted in severe destruction.
Cyclone Dana too made landfall near this port on October 24-25, 2024. ==References==