Delhi-NCR twins turn okra, fenugreek and rice husk into a Rs 100 electricity-free water filter
Delhi-NCR twins Naina and Nayantara Singh developed a plant-based water purification system.
Their innovation, Aqua Sattva, uses okra, fenugreek, and rice husk to remove contaminants.
This system targets microplastics and PFAS, often called forever chemicals.
Independent laboratory testing showed si
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