Three Gorges Dam

The Three Gorges Dam is the largest hydro-electric dam in the world. That it is a sheer engineering marvel cannot be denied. Yet questions abound over environmental and social issues, not to mention logistics problems of moving ships up and down river. An ingenious system of shiplocks has gone towards solving that problem, echoing the techniques of Banaue farmers in the Philippines who mastered the art of managing water over two thousand years ago