The document discusses ways to reduce water waste from long showers among students. It notes that the average 5-minute shower uses 15-25 gallons of water. As a solution, it proposes creating a system that turns red to signal when a certain amount of gallons have been wasted, with the goal of nudging people to take shorter showers through feedback. Less than 1% of water on Earth is freshwater, so there is high demand for a limited supply.