I came across two fascinating stories when I was researching the story about ‘direct potable reuse’ that focused on how Windhoek, Namibia, has been using this technique to supplement its water supply in a very dry city. One was about beer – more about that tomorrow.

The other is about the “zero water consumption” program that the Swiss agri-food company, Nestlé, is using to dramatically save water at many of its baby milk plants worldwide by recovering huge amounts of the ‘cow water’ it uses to make baby formula and powdered milk.