Engineers create billboard that purifies 100,000 cubic meters of air daily

Billboards of the world, you can aspire to be more than signs pointing to cheap motels and sleazy roadside attractions. An engineering team in Peru has created a billboard that they say can purify 100,000 cubic meters of air everyday—taking in pollution and spewing out sweet, fresh air for the city. The air-purifying billboard in Lima comes from the same folks at University of Engineering and Technology of Peru who created a billboard that captures drinkable water from thin air last year.