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The viability of water supplies throughout key regions of China, India, Pakistan, South Africa and the US are under threat from unsustainable domestic, agricultural and industrial demands, according to a new study that maps water use down to 10km² worldwide. The growth economies of China and India, and the world’s largest economy USA are identified by risk analysis company Maplecroft, in its newly released Water Stress Index, as having vast geographical regions and sector areas where unsustainable water use is outstripping supply. Maplecroft’s states that the situation so serious, it has the potential to limit economic growth by constraining business activities, as well as hampering agricultural outputs. Resulting reductions in crop harvests in these countries will...