Public urination can be a problem during Carnival in Rio de Janeiro. Festival-goers mostly take to the streets to relieve themselves and it has become serious that local authorities have detained people found urinating in public. As a way of combating the problem, Brazilian nonprofit organization Afroreggae, in partnership with agency JWT Brazil, came up with the Electric Pee project.
Afroreggae placed special urinals that convert urine into electricity in crowded areas of the city. The special urinal uses a process similar to that of a hydroelectric plant. The flow of urine is used to generate energy that is then stored in a battery. The energy produced was then used to power Afroreggae’s Carnival truck.
Check out the video below to get more info about how the process worked: