East Kolkata wetlands have been declared as
- ABiodiversity site
- BTourist site
- CWorld Heritage site
- DRamsar site
Solution & Step-by-step Explanation
The East Kolkata Wetlands were designated as a Ramsar site (Wetland of International Importance) on November 19, 2002. They form a complex of natural and human-made wetlands that treat the sewage of Kolkata through natural oxidation and aquaculture.