Access to clean water is about more than survival: It is about giving kids the time they need to be children - to learn, play and be happy. For children to enjoy this precious time, families need access to safe water close to where they live. The world's population will grow to 9 billion over the next 50 years -- and only by raising the living standards of the poorest can we check population growth. This is the paradoxical answer that Hans Rosling unveils at TED@Cannes using colorful new data display technology (you'll see).