Normally, a billboard only tells you about brands. Toyota took the phrase “Show, don’t tell” quite literally, and introduced Eco-Billboard to promote the new Hydrogen-fueled Toyota Miray. These billboards, a total of 37 of them can be found around Los Angeles and San Fransisco, clean the air around them by breaking down nitrogen dioxide. The special coat of a layer of titanium doxide works like an air purifier and this reduces the amount of smog around the billboard. These billboards emphasize the fact that the Toyota Mirai’s “only emmision is water”.