It’s not the most obvious subject when it comes to technology, innovation and sustainability, but sanitation should be on your mind. If you don’t have sanitation, your life deteriorates and disease takes over; but if you do have it, you simply flush and forget. Professor Christopher Buckley has dedicated some 40 years to the Pollution Research Group, and along with the Bill and Melinda Gates Foundation, has studied and explored the challenges South Africa faces in water use and sustainability. He chats to Gareth Cliff about where we’re at and what’s next in human waste management.