The document discusses how students waste large amounts of water through activities like long showers. It notes that the average 5-minute shower uses 15-25 gallons of water. Less than 1% of water on Earth is freshwater, so there is high demand for the limited supply. To reduce water waste, the document proposes a system that turns red to signal when a certain number of gallons have been wasted, nudging people to shorten their showers without forcing them to stop.