As we mark the second International Day of the Girl on October 11, I'm calling for a similar recognition of the power and potential of girls, enlisting them in our mission to bring safe, sustainable sanitation to the billions who live without it.
What will the world look like in 50 years? The problems facing our world are so large that they demand disruptive thinking. We don't have time to think in incremental terms. It's time to challenge the status quo, and dare to imagine what we can do.