When I was travelling with my family in the tropical Far East a few years back (fine, it was 10 years ago -- don't rub it in), my daughter, then 5 years old, came up to me while I was shaving and said, "Daddy! Turn off the water while you're shaving, you're wasting water." I looked at her, proud of her environmental awareness and said, "They don't have a water problem here like we do back home." And without batting an eye, she replied, "But they will, because of you!"