A crash course in changing the world.
If I were designing an event for World Water Day in 2020, I would plan it at a college campus like UF. It would be somewhere like Plaza of the Americas where many people pass by. I would display statistics that get people thinking about how much water they use and waste compared to the rest of the world.
For example, for every extra minute you take a shower, this many gallons of water are wasted. This may encourage people to conserve water and to not waste it. I would have several large posters and display all of this information. In addition, I would have a place where students could pledge to conserve water. In turn, they could get free pizza and soda for their pledge to conserve.