How floating islands can make urban waterways green and clean

Many of the world’s cities are built around waterways. Paris and the Seine, Allahabad, India and the Ganges, Cairo and the Nile — these rivers, at one time the life-force of their city, are now so polluted they’re unfit for swimming and host very little natural wildlife.

Many of the world’s cities are built around waterways. Paris and the Seine, Allahabad, India and the Ganges, Cairo and the Nile — these rivers, at one time the life-force of their city, are now so polluted they’re unfit for swimming and host very little natural wildlife.