The data on water scarcity continues to be sobering, and shortages increasingly are linked to both natural and human-made causes. By 2025, the UN suggests 1.8 billion people will live in regions that face absolute water scarcity.

In Australia right now, many regions are in drought. The most affected state is Queensland, where a total of 35 councils and four part-council areas are drought declared, with 55 individual drought stricken properties in a further 11 council areas. Some 330 million people are also affected by drought in India, with…