It was called Slum Survivor, and it helped me change some of my thinking about urban and rural poverty.

For about 70 hours, we inhabited our own little slum town. 1 set of clothes, 1 water source, no showers, 2 meals a day (of rice + daal) , sleeping on wooden pallets and cardboard. That's regular life for about 1 billion people - 1 person in 6 - on this planet. We did it for a few days and then got to go home, but 80,000 people live permanently in a garbage dump in Manila.

The UN estimates that by 2030, 2 billion people will be living in slums. That's 100 times the population of Australia. And today, as I write this, for every man, woman and child in Australia there are 50 people in the world without access to clean drinking water. 3,900 children every day, due to lack of clean drinking water and sanitation.

Before Slum Survivor those were just numbers to me, but after a few days of having to live in our little slum, it means a heck of a lot more to me now.