Catalytic converters
The University of Sheffield is purifying the air around a poster it is displaying for a year. What’s more, it says the technology used to do it could be cheaply applied to other printed billboards.
A 20m x 20m printed banner hanging on the side of the University of Sheffield’s Alfred Denny Building is cutting pollution thanks to the use of a new technology that its developer says could be applied to other billboards.
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