The world is watching as Cape Town's water crisis approaches "Day Zero". Questions are being asked about which other cities could be at risk and what can they do to avoid running dry.
In Perth, Australia's most water-stressed capital, it has been announced that the city is considering reusing all of its sewage as part of its future water supply.
Drinking recycled sewage is a very confronting topic.
But what many people don't realise is that we already rely on recycled sewage in many Australian water supplies.
Even in Australia's biggest city, Sydney, it is an important part of the water supply. This is because many large towns discharge their treated sewage into the catchment rivers that supply the city....