Pat Shingleton: "An Outdoor Message"
The folks at Lamar Outdoor Advertising may want to consider the actions of researchers in Peru. Peru's University of Engineering and Technology tested billboards that scrub air pollution and convert it to clean air. The billboards use an air filtration system that uses water to cleanse the dirty air by trapping pollutants in the water. This process allows pristine air to be emitted back into the atmosphere. Lima is recognized by the World Meteorological Organization as the city with the highest pollution levels in South America. A single billboard can purify 100,000 cubic meters of air per day which replicates the air-cleaning capacity of 1,200 mature trees. By absorbing harmful dust, the boards can clean a radius of five city blocks.