Explanation: The Neknampur Lake, Hyderabad is the largest floating treatment wetland in the country.

• Floating treatment wetlands works based on hydroponics technique.
• Hydroponics permits plants to grow on the water with the help of sunlight (no need for soil).
• A floating island unit is essentially a platform designed using styrofoam, bamboo, gunny bags and coir and it performs the function of a wetland.

Source: FORUMIAS