This billboard here is very different from every billboard you've seen. It is an air-cleaning billboard. Built by the folks at the University of Engineering and Technology of Peru, the billboard cleans up the environment better and more efficiently as 1,200 trees. 

UTEC designed the billboard to specifically filter out types of contaminants such as dust, metal particles and stone dust as well as bacteria and germs. The billboard works by using water and basic thermodynamics to clean the air and it only uses 2,500 watts when it's running.

If it works, UTEC plans to develop more of it.