Actor Matt Damon is on a mission to improve access to one of the world's most precious resources: water.
"It's really hard for people like us to relate to it, because it's just never been something we had to think about," Damon told "This Week" anchor Christiane Amanpour. "Clean water is only as far away as the nearest tap, and there are taps everywhere. There's a faucet everywhere. But the reality is, the water in our toilets is cleaner than the water that most people are drinking."