Around four billion people, almost two thirds of the world’s population, experience severe water scarcity for at least one month of the year, and half a billion live with constant water scarcity.1 In fact, since 2012, the World Economic Forum has put water supply crises among its top three global risks in terms of impact, putting it on a par with weapons of mass destruction, climate change and the outbreak of infectious disease.
Source: UN World Water Development Report, 20122
The problem is not looking like it will abate: The UN forecast in 2014 that two thirds...