A Billboard That Does Good

A giant poster that uses nanotechnology has been created by a scientist and an award winning poet from the University of Sheffield.
The two professors came up with the idea of a poster absorbing poisonous compounds from the air with the aim of cutting disease and saving lives.
The poster can absorb poisonous compounds from around 20 cars each day if put by a busy road.
The 10m by 20m poster is coated with microscopic, pollution-eating nanoparticles of titanium dioxide. When the light hits the nanoparticles, they react with oxygen, and wash the pollution out of the air.
Although the poster does not filter out all the pollutants from traffic, it does remove nitrogen oxides which have been linked to breathing problems including asthma.
A poem by Simon Armitage, called ‘In Praise of Air’ features on the poster.
The poster will be on display in Sheffield for the next year.
Via: BBC