India, March 22 -- Collecting and exploiting waste water is both technically feasible and financially justifiable
By 2025, absolute water scarcity will be a daily reality for an estimated 1.8 billion people .
In a world where vital resources are increasingly scarce, nations cannot afford to flush them down the drain. But that is exactly what we do. After we use water in our homes and businesses, it is washed away, and takes many valuable resources with it.
Waste water is rich in carbon and nutrients and - if collected and treated properly - it could provide new water, fertiliser, and energy. A number of nations and major cities have already built sophisticated waste water treatment plants that effectively recover nutrients and bioenergy,...