Students learn that their local conservation efforts can have far-reaching results. This lesson is made concrete through the experience of youth in Matamoros, Mexico, where a severe water shortage led the city to take the unusual step of putting local children in charge of changing adult attitudes and habits. Thousands of school-children were enlisted as "Water Detectives" -- educated in concepts of water conservation, and encouraged to discuss the importance of proper water usage with adults. Kids were authorized to give "tickets" to transgressors who were seen to be wasting water, and the municipality followed up by fixing leaks and visiting homes. The result? Matamoros lowered its water consumption by nearly 20% in just one year.

Documentary in English and Spanish with optional subtitles in French.