CBC Analysis: A billboard that kills mosquitoes and other cutting-edge signs
Advertisers aim to make billboards useful by adding technology to clean air, provide water and more By Bruce Chambers, for CBC News. Billboards aren't just for advertising anymore. Some are designed to do social good — like fighting disease, cleaning the air and providing shelter. […]
cbc.ca
Wed, Oct 5, 2016 at 7:41 AM
Wed, Oct 5, 2016 at 7:41 AM